The Los Angeles Film Festival has launched a spree of fetes of varying size and star power surrounding its new home at the Nokia Theater downtown.

John C. Reilly (left; photo by Getty Images) prompted co-star Jonah Hill with a key line of dialogue at the “Cyrus” premiere after-party on the terrace Friday night.

Earlier in the night, Film Independent executive director Dawn Hudson, “Cyrus” star Catherine Keener and film critic-turned-LAFF artistic director David Ansen (right; photo by Getty Images) hit the carpet at the Nokia.

Following its hot launch at Sundance, “The Kids Are All Right” opened the festival the night before. Jane Lynch and director Lisa Cholodenko (left; photo by Getty Images) headed up to Nokia’s Event Deck for the outdoor after-party after Thursday’s screening.

Across the street at Staples, Activision continued to win the offline party game during last week’s E3 convention. The Santa Monica-based publisher pushed stars of its upcoming titles, including Eminem and Tony Hawk, front and center at a concert/bash the night before the Lakers returned home for their championship-capping wins.

This follows Activision’s E3 mega-event last year promoting “DJ Hero” featuring Jay-Z, Eminem and the late Adam “DJ AM” Goldstein performing together at the Wiltern.

Eminem and Travis Barker were back for the 2010 event, joining Rihanna, Usher and Hawk in performances tied to the publisher’s upcoming releases this year. Gamer fans like Nikki Reed and Seth Green got sneak peeks at the next chapter in the “Guitar Hero” franchise, “Warriors of Rock” and shooter “Call of Duty: Black Ops,” which set Twitter ablaze with an ad during the NBA Finals’ Game 7 on Thursday night.

Luke Wilson, Stan Lee and Aaron Paul joined new gamers like Brittany Snow and Vanessa Hudgens (right; photo courtesy of Chris Weeks) at the marquee event.