<P> In court, numerous people including Corinne testify on Sonny's behalf and tell the judge he is a suitable father . Julian also testifies, providing relevant information regarding his heritage . As a final straw, Sonny calls himself to the stand and asks his Florida lawyer father Lenny, who is present, to interrogate him . Despite Lenny's fervent belief that Sonny is not father material, Sonny convinces Lenny that he will try his best at being a father . Impressed by Sonny's sincerity, Lenny vouches for him . Nonetheless, the unconvinced judge orders Sonny's arrest . However, Kevin confesses to being Julian's biological father and insists they drop the charges . Sonny remains friends with Julian and hands him off to Kevin, watching them bond . </P> <P> One year later, Sonny has turned his life around: he is now a successful lawyer, is married to Layla, and they have a child of their own . At Sonny's surprise birthday party at a Hooters restaurant attended by Kevin, Corinne, Julian and others; Sonny sees Vanessa working as a waitress, with Sid working as a cook, revealing his "five - year - plan" has gone awry . Everyone's celebrates Sonny's birthday . </P> <Ul> <Li> Adam Sandler as Sonny Koufax </Li> <Li> Cole and Dylan Sprouse as Julian McGrath </Li> <Li> Joey Lauren Adams as Layla Maloney </Li> <Li> Jon Stewart as Kevin Gerrity </Li> <Li> Leslie Mann as Corinne Maloney </Li> <Li> Rob Schneider as Nazo </Li> <Li> Jonathan Loughran as Mike </Li> <Li> Allen Covert as Phil D'Amato </Li> <Li> Peter Dante as Tommy Grayton </Li> <Li> Kristy Swanson as Vanessa </Li> <Li> Joseph Bologna as Lenny Koufax </Li> <Li> Steve Buscemi as Homeless Guy </Li> <Li> Josh Mostel as Arthur Brooks </Li> <Li> Edmund Lyndeck as Mr. Herlihy </Li> <Li> Geoffrey Horne as Sid </Li> <Li> David Spade as restaurant server </Li> </Ul> <Li> Adam Sandler as Sonny Koufax </Li>

Who played adam sandler's father in big daddy