LOS ANGELES -- On most talk shows, celebrity guests sit down with the host ready to chat about their latest project. Those who show up for "Jimmy Kimmel Live" had better be ready to do more than talk.

The ABC late-night chat host has persuaded guests to take part in comedy bits. Some of the biggest bits are held for Jimmy Kimmel's annual post-Oscars telecast, such as last year's fake movie trailer for "Movie: The Movie" that featured Meryl Streep, George Clooney, Cameron Diaz, Tom Hanks and Samuel L. Jackson.

On the "Jimmy Kimmel Live: After the Oscars!" show that airs this Sunday, a trailer for a fake sequel, "Movie: The Movie Twovie," will debut. The rundown of stars includes Jessica Chastain, Robin Williams, Bradley Cooper, Jude Law, Jamie Foxx, Salma Hayek, John Krasinski and Channing Tatum.

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The fake movie trailers -- or even the recent night when Matt Damon took over as host -- are big comedy projects planned well in advance. Other bits are quick comic skits.

"There are certain people, when we know they are booked to be a guest, that we will approach early and ask them if they have some extra time and want to shoot a bit," says Executive Producer Jill Leiderman. "Then there are certain guests who, when they are booked, will say, 'Hey, I would really like to do something extra.' "

Some guests want to do the sketches because it gives them a chance to do something different to enhance their appearance on Kimmel's show -- one of numerous chat shows they might be doing -- and cut down on their time to share chitchat.

Some celebrities would rather not sit down to talk, which Leiderman says gives the show a chance to do something different that won't be seen on a competing talk show. When those situations arise, there are 15 writers on the Kimmel staff tasked with coming up with something that works for the celebrity and the show.

The bonus is that many of the comedy skits go viral. The music video Kimmel's ex-girlfriend, Sarah Silverman, where she talks about being intimate with Matt Damon, has more than 3.5 millions views on YouTube. The original "Movie: The Movie" trailer has attracted almost 20 million views.

When it comes to the post-Oscars specials -- when the late-night show gets to air in prime-time hours on the West Coast -- Kimmel's staff wants the biggest names. It's just a matter of availability.

"We did 'Movie: The Movie' for the post-Oscars. We were able to book people -- piecemeal -- shoot them at their convenience and then cobble the whole thing together," Leiderman says.

For example, Tom Hanks gave the show a four-hour block that was used to shoot a "Toddlers & Tiara" bit, while Oprah Winfrey set aside an entire day for the team.

The other limitation is the budget. Leiderman says the writers tend to dream big, but it comes down to providing the funniest and most water-cooler-talk sparking comedy bit possible.

ON TV

"Jimmy Kimmel Live: After the Oscars!": 10 p.m. Sunday, KFSN (Channel 30.1)