Credit: Kevin Mazur/

Proud future husband and dad!

David Otunga is happy to brag about fiancee Jennifer Hudson's slimmed-down figure and their tough little boy, David Jr. "I'm as impressed as everybody else," he told Us Weekly on Thursday at the Summer Slam Be a Star event in Los Angeles.

The 31-year-old wrestler said 29-year-old Hudson's dramatic 80-lbs. weight loss might have changed her body, but kept her spunky personality intact. "She's always been super confident. She hasn't really changed to me," he said.

He was also happy to brag about his son, David Jr., who celebrated his second birthday this week. "We had a huge party. We rented out this park. He had a wrestling ring we made for him and we rented out a jumping castle. All of his friends came."

Otunga reveals that Hudson isn't thrilled with the wrestling, but "I keep on telling her, 'He's a boy, he's rough.'" And he takes after his tough mommy, too. "He also sings!" Otunga added. "He's a genius. He could be the first singing wrestler!"

But David Jr. isn't the only one with a thing for wrestling: "When I first started wrestling, I used to practice my moves on Jennifer ... she got pretty good at it!"