Matt Damon On His "Testosterone Deficient" Home

Matt Damon is gearing up for a pretty big milestone: His 3-year-old daughter Isabella’s first day of preschool!

"I think I will get emotional when we take her,” the doting dad recently told People. “Her mom and I will probably be a big mess. She's ready but I don't know if I will be."

As for his youngest daughter, Matt reveals that 13-month-old Gia “is just ready to start talking and making sounds. It's been really exciting and we are anxious to hear what she says."

As the only male in a house full of girls, the Bourne Identity star finds himself surrounded by “a lot of pink, a lot of princesses” – and it sounds as though he wouldn’t have it any other way.

"I call it the 'testosterone deficit.' But I'm happy with that,” Matt says. “I love my girls and it's lot of pink, a lot of princesses and a lot of fun."

Matt and his wife Luciana are pictured here at last week’s Venice Film Festival premiere of his new movie, The Informant – a role that required the star to pack on an extra 30lbs!

“It was very, very fun, probably the funnest time I had working, because I didn't have to go to the gym after work and I just ate everything I could see,” he says of the weight gain.

Matt says his 11-year-old stepdaughter Alexia enjoyed it, too: "She had fun with it by squeezing all the soft squishy parts and called me 'Fatty Matty.’”