That's My Boy (2012)

While still in his teens, Donny (Adam Sandler) fathered son Todd (Andy Samberg) and raised him alone until Todd's 18th birthday. Now, after years apart, Donny suddenly shows up uninvited on the eve of Todd's wedding. Donny tries desperately to reconnect with Todd and is forced to deal with the results of his bad parenting skills.—Official site