Pete Wentz and Ashlee Simpson-Wentz
11/21/2008 at 11:00 AM EST
They may be biased, but the grandparents of Bronx Mowgli Wentz say that Ashlee Simpson-Wentz
and Pete Wentz
's newborn son is already charming and independent.
"We're thrilled. [Bronx] stayed up late the first night, smiling at everyone who came into the room," according to the Fall Out Boy bassist's parents, Pete and Dale Wentz. "He already seems to have the independence and charm of both of his parents."
Equally tickled by Bronx Mowgli Wentz – who was born Thursday night
– are Ashlee's parents, Joe and Tina Simpson.
"We are happy beyond words and incredibly proud of Ashlee and Pete," they said in a statement Friday. "They are unbelievable parents already, and we can't wait to spend Bronx's first holidays together with the whole family. We are truly blessed."Who's your Favorite Star Under 35? PEOPLE.com and the People's Choice Awards are counting your votes! Click here to vote now!