Splash NewsWe haven't see Jessica Simpson's new baby son Ace Knute just yet, but that doesn't mean Ashlee Simpson isn't allowed to gush about her nephew.
"[He's] incredible," Ashlee told me at last night at the premiere of Planes, which opens in theaters Aug. 9, at the El Capitan Theatre in Hollywood. "He is a doll."
And blond, too.
When asked if Ace looks like mom or his dad, Eric Johnson, Ashlee laughed, "I gotta say he's looking a little like Bronx. They're all little towheads. They're all so cute."
Bronx would be Ashlee and Pete Wentz's 4-year-old son.
Jessica delivered Ace on June 30 via C-section. The 33-year-old former Fashion Star judge (the NBC reality-competition show was recently canceled) was spotted for the first time since Ace's birth on July 30 running errands in Beverly Hills.
The same day, Johnson, 33, was spotted with 15-month-old daughter Maxwell and Ace (who was hidden from photographers with a blanket placed over his carrier) going into a doctor's office.
Simpson and Johnson got engaged in June 2010 after dating for about six months.
One thing Ashlee wasn't dishing on was her new romance with Diana Ross' son, Evan Ross.
"Life is good," she smiled when asked about the relationship.
Ashlee walked the carpet at the premiere sans Bronx. "He just got shy, so he was like, ‘I'm going to go play now,'" she said. Target hosted a pre-screening party on Hollywood Boulevard that included toys, flight simulators, games, crafts and snacks.
Bronx also was allowed to bring a friend to the movie shindig.
"This is fun for him," Ash said. "He's already got his Planes toys, which he's been playing with all week. We love Cars and Cars 2, so this is very exciting."
For more from the Planes premiere, check out E! News tonight at 7 and 11:30 p.m.