Credit: Kevin Mazur/

Attention, Upper East Siders: Gossip Girl has two less ladies in its midst.

Taylor Momsen and Jessica Szohr have left the CW hit's cast, and will not be returning for the fifth season. After TVLine broke the story, a show insider confirms the news to Us Weekly.

Both Momsen (as little sister Jenny Humphrey), 17, and Szohr (as Brooklynite Vanessa Abrams), 26, had been with the show since its fall 2007 debut; TVLine reports that they have been invited to make future guest-star appearances.

The remaining Gossip Girl gang, however, is intact, with Blake Lively, Leighton Meester, Penn Badgley, Ed Westwick and Chace Crawford all confirmed to return; actress Kaylee DeFer is also joining the permanent cast as Charlie Rhodes, cousin to Serena van der Woodsen (Lively).

Last November, Momsen -- who has kept busy with her band Pretty Reckless -- began an "indefinite hiatus" from the show amid numerous headlines about her shocking wardrobe and foul-mouthed interviews.