Donny Berger is a fictional character from the movie That's My Boy, portrayed by actor Adam Sandler. He is known for his outrageous behavior and comedic antics, which often lead to chaotic situations. The film revolves around his relationship with his estranged son, Todd Berger, played by Andy Samberg. In the story, Donny becomes a father at a young age and struggles with the responsibilities of parenthood. As the plot unfolds, he attempts to reconnect with Todd, who has grown up to be a more serious and responsible individual. Their dynamic highlights themes of family, redemption, and the challenges of growing up.