Definitely, Maybe (2008)

Will is going through his divorce and Maya, his 10-year-old daughter, asks him about his life before marriage, especially how he fell in love with her mother. Will agrees, but he will tell her about his romances with three women with false names and she will have to guess which of the three became his wife. An engaging romantic comedy that escapes the commonplaces of the genre, with intelligent characters embodied by a great cast that includes Ryan Reynolds, Isla Fisher, Rachel Weisz, Abigail Breslin and Elizabeth Banks.