Givanni Rufino/Warner Bros


Marilyn Monroe in the 1953 hit Gentlemen Prefer Blondes
20th Century Fox

Blake Lively steps into Marilyn Monroe's heels for the upcoming 100th episode of Gossip Girl.

The starlet, as her character Serena van der Woodson, dons a platinum wig, gloves, a pink dress and loads of jewels for a modern-day, primetime interpretation of Marilyn's Gentlemen Prefer Blondes.

Accordingly, the men of the hit series take on the role of "Marilyn's" male chorus of admirers -- including Ed Westwick, Penn Badgley, and Chace Crawford.

Leighton Meester, aka Blair Waldorf, isn't left out of the dream sequence -- she makes an appearance as Audrey Hepburn.

Check out a gallery of photos from the episode and watch it Monday on the CW!

Blake Lively has left the Upper East Side (and Leonardo DiCaprio, for the moment) and headed for the hills!

The 23-year-old was spotted filming Gossip Girl scenes with co-star Kaylee DeFer in Beverly Hills, CA Friday ... far from her usual Big Apple hot spots!

While a few of Blake's co-stars like ex Penn Badgley are still in New York City, Blake has been filming in Los Angeles with Kaylee, Ed Westwick and Chace Crawford all week.

It's no surprise that the actress who plays Serena van der Woodsen looked as stylish as ever in character, sporting a bright red cropped blazer, blue-and-white striped tank top, floral pleated skirt, turquoise handbag and gold accented drop earrings. We're kind of surprised about the casual blue-and-gold flip flops though - not a Serena staple, but the whole outfit is so cute look that we'll let it slide.

Between scenes, Blake was spotted in a white bathrobe. A girl's got to stay comfy!

See more of Blake's outfit ... after the jump.

Liz Hurley is heading to the Big Apple!

It was a blessing in disguise when NBC cancelled Wonder Woman, because Miss Hurley just landed a much cooler gig -- she's officially joining the cast of Gossip Girl for the upcoming fifth season.

The sexy Brit will play Diana Payne, "a sexy, smart, self-made media mogul and all-around force to be reckoned with" according to TVLine.

Executive producers said in a statement of Hurley joining the cast: "Elizabeth's sense of humor, intelligence and beauty fit the GG world perfectly. We feel very fortunate to have her."

Gossip Girl season five premieres Sept. 26 on the CW.

Monday night, Gossip Girl Leighton Meester sang at the Troubadour in West Hollywood and co-star Michelle Trachtenberg stopped by to enjoy the show ... and hopefully not gossip about it.

Leighton is working to cultivate herself as a double threat -- she sang in the flick Country Strong and has collaborated on tracks with other artists.

The two were all smiles -- Leighton was especially bashful in front of the cameras as a mystery man tried to hide her face. Check out the pics in our gallery below and our video after the jump!

Leighton Meester was a sparkly jewel on the MTV Movie Awards red carpet Sunday.

The Gossip Girl actress wore Balmain with Pierre Hardy heels.

Leighton lost out on the Best Villain award for her roll in The Roommate, but she won on the red carpet!

Taylor Momsen will have to be content with troublemaking off screen, apparently.

The actress and her co-star Jessica Szohr will no longer star on the CW's Gossip Girl, TVLine reports.

Momsen played Jenny and Szohr played Vanessa. Momsen had made it quite clear in past interviews that she wants to focus on her music (the 17-year-old fronts The Pretty Reckless) and her on-set antics have made headlines. Tim Gunn guest starred on the show in November and called Momsen a "diva" and "a brat."

Gossip Girl is coming up on its fifth season. The show's core cast -- Blake Lively (Serena), Leighton Meester (Blair), Penn Badgley (Dan), Ed Westwick (Chuck) and Chace Crawford (Nate) -- will all be back in the fall.

In addition - one star will be promoted to series regular status and become a main character on the show. See who after the jump!

Not that Blake Lively could ever really look "drab," but still! Check out the Gossip Girl starlet filming with Kelly Rutherford at Intermix in NYC on Tuesday, and then later on drinking a coffee on the street corner.

Bet she's excited that The Town is getting so much attention this awards season. Will Blake attend the Oscars this year?

The TV show must be oh so draining. Acting = hard work! Leighton Meester looked exhausted on the Gossip Girl set in New York on Tuesday afternoon. Tired... or bored? After all, Leighton is battling co-star Blake Lively to be the next TV star turned movie star.

Leighton appears alongside Gwyneth Paltrow in the upcoming Country Strong and next year stars in college thriller The Roommate. Meanwhile, Blake currently co-stars in the acclaimed The Town and next summer takes on a leading role in Green Lantern.

Question is, which actress has the staying power?