updated 11/18/2010 AT 9:00 AM ET
•originally published 11/18/2010 AT 11:30 AM ET
“He’s wonderful,” Ashlee Simpson-Wentz told PEOPLE of Jessica’s new fiancé at the launch party of Google’s Boutiques.com in New York on Wednesday. “They’re so easygoing together. They really bring out the best in each other. It’s beautiful.”
Ashlee, 26, says she and the family are “beyond excited” about the upcoming nuptials, but adds that the wedding planning hasn’t really started yet. “Right now we’re just really enjoying the engagement and their happiness,” she says.
Ashlee, meanwhile, has has another celebration on her mind: son Bronx Mowgli’s second birthday this Saturday. “We’re going to have a get together at my mom’s, so it’ll be fun,” she says.
Luckily, it seems Bronx isn’t suffering from the terrible twos. “He’s so sweet, he’s very sweet natured,” Simpson-Wentz says. “He’s really into Thomas the Train, and now he’s watching movies sometimes. and I’m like, ‘Whoa!’ It’s so crazy.”