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!

Michael Simon

Blake Lively has been hanging out in Boston this week to visit reported beau Ryan Reynolds, and we're not surprised to see the Gossip Girl star looking picture perfect while chatting away on her cell phone.

Lively, who split from actor Leonardo DiCaprio after dating for five months, is seen here rocking skintight Diesel "Grupee" jeans and a leather "L-Sienna" coat.

As for her recent romance with Reynolds, a source tells the NY Daily News, "It's getting more serious. Ryan really respects her."

Reynolds, who is currently filming the movie C.I.P.D. in Boston, is most likely thrilled to have this blonde beauty keeping him warm. Chestnuts roasting on an open fire ...

Blake Lively, Miranda Kerr and Sarah Jessica Parker looked gorgeous at the Museum of Modern Art's 4th Annual Film benefit "A Tribute to Pedro Almodovar."

The three beauties were all smiles while honoring the writer-director in NYC. Almodovar has directed numerous films including Bad Education and Volver starring Penelope Cruz.

At last night's event, Cruz said the following about Almodovar: "You are one of the funniest people in the world for sure."

Funny ... and well-loved by some of Hollywood's most stunning ladies!

Blake Lively and Ryan Reynolds co-starred in The Green Lantern, and now they're reportedly looking to cohabitate.

The two have only been seeing each other romantically for about a month; Lively began dating Reynolds quickly after splitting from summer fling Leonardo DiCaprio.

But The New York Post says the actress, 24, and actor, 35, were spotted looking at NYC apartments together, including a three-bedroom, $4.35 million penthouse on famous Fifth Avenue in Madison Square Park.

"When they were done, she left the building first, wearing tall boots, jeans, coat and fedora, and got straight into a Town Car, and then Ryan exited into the same car," the Post's source said. "Her little dog was waiting with the driver in the front seat."

Lively lives in Chelsea -- she's in NYC most of the time to shoot Gossip Girl.

Beauty Blake Lively looked lovely on the set of Gossip Girl in New York on Tuesday ... lovely, but sad!

We're guessing Blake's feeling blue over parting ways with her new love, Ryan Reynolds. The 24-year-old actress helped Ryan, 35, celebrate his birthday earlier this week in Boston with a bunch of colorful balloons.

But now it's back to the Big Apple, where Blake filmed new scenes for the show with her ex, Penn Badgley!

Though the two dated for about two years, it seems they've both amicably moved on. Penn is reportedly dating Zoe Kravitz, and Blake, of course, enjoyed a summer fling with Leonardo DiCaprio. And moved on with Ryan only a few weeks later.

Leonardo DiCaprio and Blake Lively have ended their summer fling. The Gossip Girl star's rep has confirmed the split to X17online with the following statement, "They have split."

The twosome went public back in May while sailing aboard Steven Spielberg's yacht in Monte Carlo.

Since then, Blake, 24, and Leo, 36, have been seeing hanging out at Disneyworld and shopping together in Beverly Hills. Oh, well ... at least they had fun over the past five months!

Reps for both stars add the couple "remain friends."

Before the two hooked up, Leo had been dating model Bar Rafaeli on-and-off for five years, while Blake spent three years dating Gossip Girl co-star Penn Badgley.

Blake Lively continues to work hard on the set of Oliver Stone's movie Savages in Laguna Hills.

The Gossip Girl cutie spent hours behind the wheels of a convertible Mini Cooper ... with a camera capturing her every move. Keep your eyes on the road, Blake!

While filming in Orange County, Blake has been taking advantage of the gorgeous weather, even slipping away earlier this week for a beachside photo shoot.

Wonder if her beau Leonardo DiCaprio will be joining his ladylove on set? We hope so!

We're not surprised Leonardo DiCaprio is captivated by Gossip Girl star Blake Lively. We are, too!

The blonde beauty, wearing a flowy orange maxi-dress and turquoise belt, posed barefoot on the beach in Orange County for an easy, breezy photo shoot. Check out that thigh-high slit!

The 24-year-old starlet has been busy filming Oliver Stone's upcoming thriller Savages alongside John Travolta. In the film, she sports hippie-chic fashion ... a 70's trend that seems to have influenced this photo shoot.

See more of Blake's breathtaking shoot in our gallery below.