Definitely, Maybe Cast Guide and Where to Watch
A TMDB-backed guide to Definitely, Maybe, including cast, release facts, genres and watch-provider notes.

Here's the full cast of Definitely, Maybe (2008) — who plays who — plus where to watch and the essential facts about this movie. Three relationships. Three disasters. One last chance.
Where to watch
TMDB's U.S. watch-provider data lists YouTube TV. Availability changes by country and date, so check your streaming app before watching.
Cast
Ryan Reynolds as Will Hayes; Abigail Breslin as Maya Hayes; Elizabeth Banks as Emily; Isla Fisher as April; Rachel Weisz as Summer Hartley; Kevin Kline as Hampton Roth; Derek Luke as Russell McCormack; Liane Balaban as Kelly
About Definitely, Maybe
When Will decides to tell his daughter the story of how he met her mother, he discovers that a second look at the past might also give him a second chance at the future.
More like Definitely, Maybe
- Speechless
- In a World...
- Class Rank
- The Map of Tiny Perfect Things
- No Strings Attached
- Because I Said So
- Only the Lonely
- I Married a Witch
Figures and availability come from public TMDB data and are provided as a sourced reference.
Frequently asked questions
Where can I watch Definitely, Maybe?
TMDB's U.S. watch-provider data lists YouTube TV. Availability changes by country and date, so check your streaming app before watching.
Who is in the cast of Definitely, Maybe?
Ryan Reynolds as Will Hayes; Abigail Breslin as Maya Hayes; Elizabeth Banks as Emily; Isla Fisher as April; Rachel Weisz as Summer Hartley; Kevin Kline as Hampton Roth; Derek Luke as Russell McCormack; Liane Balaban as Kelly
Is this Definitely, Maybe guide official?
No. It uses TMDB data as a reference and is not endorsed or certified by TMDB.



