Olivia Wilde recently shot down pregnancy rumors in an epically hilarious way, but the 31-year-old actress can't stop gushing about her son Otis, who turns 2 years old in April.
"I'm just everyday more grateful and realizing how I have completely won the life lottery," Wilde gushed to ET's Katie Krause at UNITE4:GOOD and Variety's 3rd Annual "UNITE4:HUMANITY" event presented by Karma on Thursday. "It's just so clear to me at every stage of his growth, and my own growth as a mother."
Wilde said she and fiance Jason Sudeikis are, unsurprisingly, fun parents, though she knows that one day, they'll have to put their foot down with their son.
"We'll learn eventually," she said with a laugh. "But for now, we can be fun."
The Vinyl star was honored with the Unite4Children award at Thursday's event for her work with Save the Children, where she serves as an artist ambassador for infant, child, and maternal health. Wilde said her own blessings in life have motivated her to help those less fortunate.
"It just makes me realize how lucky I am," she added. "Because of that luck, I have a responsibility to help other mothers...I wanted to be helpful in some way."
Save the Children, a non-governmental organization, provides aid to children in the U.S. and developing countries around the world. Wilde said the nonprofit, which helped more than 166 million kids in 2014, is "responding to a very real need in the world today."
"I think the statistic is six million children die every year from entirely preventable causes, and half of those are newborns," the actress explained. "When you have a stat like that, you realize this is a crisis and it involves coordinating lots of different humanitarian partners under one purpose -- which is to help children -- whether they're in conflict zones or whether it's from famine or drought. I'm just really in awe of the way that Save the Children approaches that crisis."