The AI scene partner
that waits for your line
No reader? Offbook is an AI scene partner app for actors. Upload your scene and pick your part. Realistic voices play the rest of the cast, and Offbook comes in on cue when you finish each line.
What is an AI scene partner?
An AI scene partner is an app that reads the other characters in your script out loud and waits while you say your lines. You get a reader for every run, at any hour, without booking anyone.
How it works in Offbook
- Upload your script. A PDF, photos of the pages, a text file, or pasted text. Offbook finds the characters and their lines.
- Pick your role. Realistic voices read every other character, and you choose the voice for each one.
- Say your line. Offbook listens through your microphone and plays the next cue when you finish.
A scene partner gives you something to play against. Without one, most actors end up reading the other lines in their head, which trains you to wait for your turn instead of listening for it.
A scene partner app fills that gap. In Offbook, realistic voices read every character you are not playing. Offbook listens through your microphone while you speak. When you finish your line, it plays the next cue. If you need a moment, it waits. If you go up on a line, you can look, try again, or say “next line” to move on.
Your scene partner is there at midnight, on a Sunday, or ten minutes before you leave for the audition. It will run the same two pages forty times without complaint, and those hours of repetition are what make the words automatic, so you walk into the room ready to play.
Want to hear the idea before you sign up? Our free run lines online tool lets you rehearse short scenes from classic plays with Offbook’s voices.
Used by actors from top institutions
Training at the world's leading drama schools and theaters
How to rehearse with the Offbook scene partner app
Upload the scene, cast your partners, and start
Upload the scene
Add a PDF, photos of the pages, a text file, or pasted text. Offbook detects the characters and their lines.
Choose your part
Pick who you play. You can switch roles at any time from Scene Controls and run the scene from the other side.
Cast your partners
Smart match gives each character a fitting voice. Preview voices and swap any of them. Twelve voices come with every plan.
Rehearse out loud
Offbook plays your partners' lines and listens for yours. Finish a line and the next cue comes in. Spacebar pauses.
Shape how your scene partner reads
A cue that comes too fast or too flat throws off your timing. These controls let you set up the read you need.
Per-line speed
Set any line from 0.5× to 2×, so a fast exchange stays fast and a slow build gets room.
Pauses before a line
Add 0.5 to 5 seconds before a cue to hold a beat instead of jumping on it.
Voice Clone
Record a partner's line in your own voice when you need it delivered with an exact pace or emphasis.
Regenerate a read
Not happy with how a line sounds? Generate fresh audio for it, or change the character's voice.
Stage directions
Skip them, have a narrator read them, or show them on screen and hold the scene while you play the action.
Teleprompter mode
Show your active line front and center, with each word highlighted as you say it.
AI scene partner vs. a human reader vs. a recorded-cue app
There are three ways to get your cues when you rehearse. Here is how an AI scene partner compares with the other two.
| Compared on | AI scene partner app | Human reader | Recorded-cue app |
|---|---|---|---|
| Who reads the other lines | Realistic voices, from the script you upload | A friend, classmate, coach, or paid reader | Recordings of every cue, made by you or a castmate |
| Setup before the first run | Upload the script and pick your role | Find a time that suits you both and send the sides | Record every other line, and again after each rewrite |
| Waits for you to finish | Yes. It listens for the end of your line | Yes | Most leave a fixed gap or wait for a tap; a few listen for your last word |
| How you shape the read | Per-line speed, pauses before cues, regenerated reads, or Voice Clone | Ask your reader for a different read | Record the cue again |
| When you can rehearse | Any hour, as many runs as you like | When they are free | Any hour |
| Cost | A monthly plan with voices included. Offbook starts at $7.99/mo billed annually | Free with a friend when one is free. Paid readers set their own fee | An app purchase, plus your time recording every cue |
| Best for | Learning the lines, running the scene at any hour, and reading for your self-tape | Running the scene in person with a castmate | A cast that records a play together |
An AI scene partner is best for
- Repetition: running a scene again and again until the words are automatic
- Odd hours and short notice, with nobody to schedule
- Drilling one tricky section without using up a friend's patience
- A consistent read, so you can tell what changed in your own work
- Learning your cues by switching roles
Then bring it to your castmates
- Blocking, physical contact, and staging in the room
- Run-throughs with the cast once the words are automatic
- More time to play, because no one is still learning lines
A simple split: learn the lines with Offbook, then bring them to your partner or class ready to play. For more ideas, read how to practice lines without a scene partner.
Ways actors use a scene partner app
Audition sides
Upload the sides, trim the scene to your pages, and run it until you can play it with the paper down. Then use the same scene as your reader for the tape. See self taping without a reader.
A full play, one scene at a time
Upload each scene or act on its own, then work through them with scene looping and hidden lines. Duplicate a scene to keep one full version and one cut-down version for drilling.
Class scene work
Share the scene with your class partner. You each rehearse on your own time with your own role, and you arrive at rehearsal with the words already learned.
Script analysis between runs
Genie, Offbook's script assistant, reads your scene and answers questions about motivation, subtext, and beats. Switch its style to Director's Chair, Acting Coach, or Script Analyst depending on the kind of feedback you want.
Tips for rehearsing with an AI scene partner
- Wear headphones while you learn. They keep your partner's audio out of your microphone, so Offbook hears only you.
- Start lenient, finish strict. Forgiving detection is fine early on. Switch to Strict when you are close to word perfect.
- Hide your lines early. When your text is gone, you have to listen to the cue instead of reading ahead.
- Put the beats in. Add a pause before a line where you want a moment, so the scene does not rush you.
- Swap roles once. Hearing the scene from the other side shows you what your partner needs from you.
- Run it as often as you like. Generating new audio uses your monthly allowance, but running a scene again does not.
Beyond expectations
Offbook is transforming how actors prepare for their roles, enabling faster memorization and deeper character work across theater and film.
“This saved my finals. I was running lines on this app at 2AM so I could practice my three scenes as many times as I needed.”
Drama Student • Fordham University
“My new line-learning process is simple, get my sides, pop them into Offbook, drill. No more bugging my friends to read for me.”
Film & TV Actor • Los Angeles
“You can clearly see in the quality of the application that it was built by actors who know what they're doing. Very detailed and useful. I really like it.”
Stage Performer • New York City
“I like that Offbook never gets frustrated when I need to repeat sections over and over. I can actually focus on my delivery.”
Film & TV Actor • Chicago
“Started using this for my conservatory work. I really like the chat feature where I can validate my script analysis and get a second opinion.”
Theater Graduate • DePaul University
“Got sides last minute while I was traveling. I didn't have anyone to run with, so I rehearsed on the app in my hotel room. By the end, I felt ready to tape.”
Actor in-training • HB Studios
AI scene partner: common questions
What is an AI scene partner?
An AI scene partner is an app that reads the other characters in your script out loud and waits while you say your lines. In Offbook, you upload a script and pick your role, realistic voices read every other part, and Offbook listens through your microphone and plays the next cue when you finish.
Is there an app that can be my scene partner?
Yes. Offbook is a scene partner app for actors. You upload your script and choose your role, and realistic voices read the other characters. Offbook listens through your microphone and plays the next cue when you finish your line.
Does the AI scene partner react to how I say my line?
Offbook listens to know when you have finished your line, then plays the next cue, so the timing follows you. The delivery comes from the script text, and you shape it with per-line speed, pauses, regenerated audio, or Voice Clone.
Can I rehearse with a real scene partner too?
Yes. Share a scene and your partner can rehearse it with their own role choice. Starter lets you invite up to 5 people per scene by email. Pro and Premium add unlimited invites and a share link. Free accounts can practice scenes shared with them.
Can I run the scene as the other character?
Yes. Open Scene Controls and pick a different character under Your Role. It is a good way to learn your cues from the inside.
Can I use the scene partner app on my phone?
Yes. Rehearse out loud on your laptop with the full script on a big screen, and listen to your scenes on your phone anywhere. Rehearsing with the microphone works in a laptop or desktop browser, Mac or Windows, and we recommend Chrome. An iPhone app is coming soon.
Can I use an AI scene partner for a self-tape?
Yes, as your reader. Offbook does not record video. Open it on a laptop next to your phone or camera, and it reads the other lines and waits for yours while you film with your usual setup. Read the self-tape instructions first: if they ask for a live reader, use one.
Is an AI scene partner the same as a line reader app?
Mostly, yes. Both read the other lines for you. "Line reader" is the word actors use for reading cues to learn lines or tape an audition, and "scene partner" is the word for running the whole scene out loud. Offbook does both from the same script.
Is there a free AI scene partner?
Offbook has a 7-day free trial (card required). To try a simple reader with no account, our free Run Lines Online tool lets you rehearse short scenes from classic plays with Offbook’s voices.
How much does Offbook cost?
Every plan starts with a 7-day free trial, and a card is required. After the trial, Starter is $9.99/mo, Pro is $14.99/mo, and Premium is $29.99/mo. Annual billing starts at $7.99/mo.
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