All grown up! Party Of Five star Lacey Chabert celebrates her 30th birthday and shows off her curves in a sequined black dress for bash

PUBLISHED: 19:47 EST, 30 September 2012 | UPDATED: 01:53 EST, 1 October 2012

She's best known for her role as the orphaned 11-year-old Claudia Salinger in Party of Five.

But Lacey Chabert is all grown up and was celebrating her 30th birthday at Planet Hollywood Resort & Casino in Las Vegas on Friday night.

The petite brunette showed off her curves in a figure-hugging sequined dress and metallic platform sandals.

What happens in Vegas: Lacey Chabert celebrates her 30th birthday at Planet Hollywood

Lacey spoke out recently about her Mean Girls costar Lindsay Lohan's latest run-in with the law.

'You just never know what people have going on in their personal lives. I think that people should stop being so judgmental, she told Perez Hilton.

'I just wish her the best and hope she pulls it together — she’s so talented, I don’t know, all I can say is I wish her the best. She’s very sweet, we enjoyed working together. She's in my prayers.'

Mean girl: Lacey wished her Mean Girls co-star Lindsay Lohan the best

The Family Guy actress was joined by pals Amy Davidson, 33, and Ali Fedotowksy, 28, for a special performance of the burlesque troop, The Pussycat Dolls.

8 Simple Rules actress Amy wore a daring black dress with a plunging neckline and left her long red locks loose.

Ali, who was in the sixth series of reality show The Bachelor alongside Jake Pavelka as well as The Bachelorette, opted for a gold lame skirt with matching shoes and hair accessories.

Girls' night out: Lacey partied with pals Amy Davidson and Ali Fedotowksy

Sin City: Simple Rules actress Amy Davidson in an all-black ensemble while Ali Fedotowsky, who has appeared on both The Bachelor and The Bachelorette, goes for gold