The upcoming film stars Gleeson as Tim Lake, who finds out that he can travel through time. Although Lake won't be able to change history, he has the power to change what happens and has happened in his life.
Lake uses his new gift to get a girlfriend, played by McAdams. While Lake tries to change the situations in his life, his gift can't save him from the sorrows and ups and downs that affect all families, everywhere.
About Time also stars Bill Nighy, Tom Hollander and Margot Robbie.
Gleeson is best known for his Harry Potter role as Bill Weasley.
About Time will open on March 22 in the UK and May 10 in the US.