Photos of Ashlee Simpson, Kellan Lutz, Jessica Stroup, Shenae Grimes, Michael C. Hall, Taye Diggs at InStyle Party

Ashlee, Kellan, and the 90210 Stars Celebrate a Stylish Summer

Ashlee Simpson looked adorable in her romper and pearls at InStyle magazine's annual Summer soiree last night at The London Hotel in LA. Kellan Lutz wore his signature gray, while back in the States on a break from working on Eclipse in Vancouver ahead of next week's NJ Twilight convention. Kellan's off-again girlfriend AnnaLynne McCord wasn't in sight, but her 90210 costars Shenae Grimes and Jessica Stroup laughed together on the red carpet in their short dresses. Taye Diggs posed proudly with his pregnant wife, Idina Menzel, while Michael C. Hall and Jennifer Carpenter smiled for the cameras as many more celebrities piled in to the party for a star-studded night of style.

To see tons more photos, including Emilie de Ravin, Mindy Kaling, Kara DioGuardi, Jenna Dewan, Lindsay Price, and many others just read more.

Images include: Ashlee Simpson, Busy Phillips, Danny Masterson, Eliza Dushku, Emilie de Ravin, Gabrielle Union, Idina Menzel, Jenna Dewan, Jennifer Morrison, Jessica Stroup, Jordana Brewster, Kara DioGuardi, Kellan Lutz, Kevin McKidd, Lindsay Price, Maria Menounos, Michael C. Hall, Ron Livingston, Rosemarie DeWitt, Shenae Grimes, Taye Diggs, Tyrese Gibson, Katie Cassidy, Brian Geraghty, Donald Faison, Garcelle Beauvais, Jennifer Carpenter, Jessica Lucas, Kat Dennings, Jane McKidd, Krysten Ritter, Mindy Kaling, Terri Seymour

Source: WireImage