Everyone’s getting their sisters in on the action!

Stephanie Pratt started showing up on The Hills last season, and it looks like Holly Montag — who’s Joe Francis’ new assistant — will be showing up THIS season. She’s started to pop up on red carpets next to Heidi.

Sisters are totally this season’s hottest accessory. They’re the new baby!

Who’s the hotter Montag sister?

Joe Francis’ new assistant?

Holly Montag, sister to Heidi.

“His last assistant quit,” said our insider. “And Joe aggressively sought out Holly to work for him.” Another source told us, “She’s running his life.” Francis - who will do battle on “Celebrity Apprentice,” and might also appear on “The Hills” this season - told us, “Holly is fantastic, probably the best assistant I have ever had.”

Man, can we please do a reality series about being Joe Francis’s assistant? Does it just involve responding to subpoenas for him all day?

Perhaps most interesting, before I found the picture above of Heidi and her sister Holly, all searches for “Holly Montag” resulted in photos of Heidi before she was well-known. And I was like — “Holy crap that girl’s had a lot of plastic surgery.” You don’t notice it as it happens slowly, but when you look back — this photo was taken in August 2006, just two years ago — you’re like “Dayum.”

Maybe in the comments section we can try to identify all the procedures she’s had.