Wow, Ashlee Simpson's Son Is All Grown Up — See Photos From Their Sweet Family Outing!

Ashlee Simpson's son is getting so big! On Saturday, Ashlee and Evan Ross attended a fundraiser for cancer in LA and brought along 9-year-old Bronx (whom Ashlee shares with ex-husband Pete Wentz). The trio were as cute as can be as they posed for pictures together and linked up with CeeLo Green and his wife, Shani James. At one point, Ashlee and Evan even took the stage for a special performance. Sadly, their daughter Jagger didn't join them this time around, but she and Ashlee recently attended a makeup event in LA.

Ashlee and Evan are currently gearing up for the premiere of their E! docuseries ASHLEE+EVAN. The show, which debuts on Sept. 9, will follow the couple as they juggle their lives as parents and musicians. In addition to hearing new music from the pair, we'll also be treated to even more adorable glimpses of their family. We can't wait!