6:21 p.m. -- Last year's supporting actress winner, Rachel Weisz, dressed in a strapless, flowing silver gown, presents the first major award of the evening, supporting actor. The winner is 72-year-old Alan Arkin for "Little Miss Sunshine" as the heroin-sniffing grandfather. His last nomination was 38 years ago for "The Heart Is the Lonely Hunter." "Acting for me has and always will be a team sport," he says. Arkin's win is somewhat of a surprise, considering Eddie Murphy had won the lion's share of other awards for "Dreamgirls."
6:25 p.m. -- DeGeneres walks down the aisle and talks to Mark Wahlberg, who just lost the supporting actor award, as well as best director Martin Scorsese, to whom she presents a screenplay she called a cross between "Goodfellas" and "Big Momma's House." Her conversation leads into an introduction of the dance company Pilobolus, which transforms itself into the penguins of "Happy Feet."
6:31 p.m. -- Clips from best picture nominee "The Departed" screen, with narration by stars Matt Damon and Leonardo DiCaprio. Next on stage are James Taylor and Randy Newman performing the best song nominee "Our Town," from "Cars," written by Newman.
6:33 p.m. -- Melissa Etheridge performs her Oscar-nominated composition "I Need to Wake Up" from the documentary "An Inconvenient Truth." The song is the first to be nominated from a documentary since "More" from "Mondo Cane," 43 years ago.
6:36 p.m. -- Al Gore and Leonardo DiCaprio take the stage to announce that the Oscar show has "gone green." Gore says that environmental practices have been involved with all aspects of the show. DiCaprio says that Gore is "a true champion" in the cause against global warming. DiCaprio eggs Gore to make a major announcement tonight. Gore says that with a billion people watching he will take this opportunity "to formally announce my intention ...," at which point he is interrupted by swelling music, reminding them that their time is up.
6:42 p.m. -- DeGeneres introduces Cameron Diaz to present the award for animated feature to George Miller's dancing penguin environmental-centric "Happy Feet." It is Miller's first animated feature. The Australian previously directed such films as "The Road Warrior" and "Lorenzo's Oil." He also produced and co-wrote the 1995 Oscar-nominated family film "Babe."
6:46 p.m. -- Ben Affleck introduces a series of clips from director Nancy Meyer, which affectionately looks at how writers are portrayed on screen.
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6:50 p.m.-- Helen Mirren and Tom Hanks present the Oscar for adapted screenplay, introducing the nominees with excerpts from each script. Hanks announces the winner is William Monahan for the gangster epic "The Departed." The screenplay was based on the 2002 Hong Kong hit "Infernal Affairs."
7 p.m. -- DeGeneres, now dressed in a white pantsuit, introduces "the Ellen Oscar bjorn," then introduces "The Devil Wears Prada" co-stars Anne Hathaway and Emily Blunt, who banter with "Prada" Oscar nominee Meryl Streep. The two present the Oscar for costume design to Milena Canonero for Sofia Coppola's punk rock take on "Marie Antoinette."
7:05 p.m. -- Tom Cruise walks on stage to the theme song from "Mission: Impossible" to present the Jean Hersholt Humanitarian Award to producer and studio executive Sherry Lansing.
7:08 p.m. -- Lansing walks on stage to a standing ovation and Cruise whispers in her ear as he presents the award. "I must admit that it feels a little strange to be singled out," she says. "We work in a culture where we are encouraged to speak out."
7:11 p.m. -- DeGeneres schmoozes with Clint Eastwood, who calls her "darling" and asks if she has a script for him, noting, "You gave Marty a script." DeGeneres asks Steven Spielberg to take a picture of her with Eastwood for MySpace, telling him, "Make sure we're both in, Steven." "Make it more even on both sides," she quips when she sees the first picture. She introduces Gwyneth Paltrow, who presents best cinematography to Guillermo Navarro for "Pan's Labyrinth," the only film to have three awards so far.
7:21 p.m. -- Naomi Watts and Robert Downey Jr. present the best visual effects Oscar to John Knoll, Hal Hickel, Charles Gibson and Allen Hall for "Pirates of the Caribbean: Dead Man's Chest."
7:24 p.m. -- Veteran French film star Catherine Deneuve and Japanese actor Ken Watanabe of "Letters From Iwo Jima" present a montage of past foreign language film winners, compiled by Giuseppe Tornatore, who directed the Oscar-winning "Cinema Paradiso."
7:29 p.m. -- Cate Blanchett and a striking Clive Owen present the best foreign language film Oscar to Germany's Florian Henckel von Donnersmarck for his "The Lives of Others," about the East German secret police before the fall of the Berlin Wall.
7:32 p.m. -- DeGeneres goes behind the screen onstage and does simple shadow tricks and runs into Pilobus, which turns into a serpent and devours her. "They're naked," she says.
7:33 p.m. -- The always dapper George Clooney presents the best supporting actress award to Jennifer Hudson for her performance as an R&B singer in "Dreamgirls." Though considered the favorite, Hudson looks shocked when Clooney calls out her name. "I just have to take this moment in," she says, overflowing with emotion. "I just can't believe it." Hudson mentions her grandmother as her greatest inspiration because she was a singer who didn't get a break. As she leaves the stage she also thanks Jennifer Holliday, who originated her role as Effie White on Broadway. It's second award of the night for "Dreamgirls."
7:40 p.m. -- Clips of best picture nominee "Babel" screen with narration from its director, Alejandro Gonzalez Inarritu, and co-star Cate Blanchett.
7:41 p.m. -- "Casino Royale's" Eva Green and "Babel" heartthrob Gael Garcia Bernal present the documentary short subject Oscar to Ruby Yang and Thomas Lennon for "The Blood of Yingzhou District." The film examines the lives of orphans in China whose parents have died from AIDS complications.