Sienna Miller news, pictures and videos!

Diddy, Cassie and Zac Posen // Special Screening of "The September Issue" in NYC

Cassie and Diddy, pictured above with designer Zac Posen, attended a special screening for “The September Issue” Wednesday (Aug 19) in New York City. Could Cassie and Diddy not make their “relationship” any more obvious?

Other famous faces who hit up the screening were supermodels Jessica White and Chanel Iman, who was pictured sucking face with her boyfriend. Actress Sienna Miller also attended the special NYC screening of the film.

PHOTOS: GETTY IMAGES / WIRE IMAGE

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Marlon Wayans, Rachel Nichols and Channing Tatum // "G.I. Joe: The Rise of Cobra" Movie Premiere

Co-stars Marlon Wayans, Rachel Nichols and Channing Tatum posed for a group pic on the red carpet at the premiere of their new movie, “G.I. Joe: The Rise of Cobra,” held at Grauman’s Chinese Theater Thursday afternoon (Aug 6) in Los Angeles. Sienna Miller, Ciara and Terry Crews also attended the movie premiere.

The film reportedly opened in the number one spot this weekend raking in over $56 million, despite movie-goers not being able to hear how the movie was via film critics. Paramount, the movie’s distribution company, didn’t allow critics to screen the movie before its release.

PHOTOS: GETTY IMAGES / WIRE IMAGE

Channing Tatum, Sienna Miller and Marlon Wayans // Fuse's No. 1 Countdown (August 4th 2009)

Continuing their promo rounds for their new movie, “G.I. Joe: The Rise of the Cobra,” actor Channing Tatum, actress Sienna Miller and actor/comedian Marlon Wayans paid a visit to Fuse’s No. 1 Countdown on Tuesday (Aug 4). The film hits theaters nationwide this Friday, August 7th!

Channing Tatum and Marlon Wayans // Fuse's No. 1 Countdown (August 4th 2009) Channing Tatum // Fuse's No. 1 Countdown (August 4th 2009) Sienna Miller // Fuse's No. 1 Countdown (August 4th 2009) Marlon Wayans // Fuse's No. 1 Countdown (August 4th 2009)

PHOTOS: GETTY IMAGES

Sienna Miller, Marlon Wayans, Channing Tatum, Rocsi and Terrence J // BET's 106 & Park (August 3rd 2009)

Actress Sienna Miller, comedic actor Marlon Wayans and actor Channing Tatum hit up BET’s 106 & Park Monday (Aug 3) to promote their new movie, “G.I. Joe: The Rise of Cobra,” set to hit theaters this Friday, August 7th. Above is a shot of the three of them posing with 106 & Park’s VJs Rocsi and Terrence J. Check out the rest of the pics below!

PHOTOS: WIRE IMAGE / GETTY IMAGES

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