Charlie Sheen roast

Roast master Seth MacFarlane cracks a joke at Charlie Sheen‘s expense during Saturday’s roast at Sony Pictures Studios.   (Allen J. Schaben / Los Angeles Times)

“Star Trek” icon William Shatner makes his entrance.   (Allen J. Schaben / Los Angeles Times)

Charlie Sheen makes his entrance as Slash performs.   (Allen J. Schaben / Los Angeles Times)

“Jackass” actor Stephen “Steve-O” Glover, left, and William Shatner.   (Allen J. Schaben / Los Angeles Times)

William Shatner, left, Kate Walsh and boxer Mike Tyson laugh it up during Charlie Sheen‘s roast.   (Allen J. Schaben / Los Angeles Times)

Boxer Mike Tyson, left, and comedian Jeffrey Ross.   (Allen J. Schaben / Los Angeles Times)

William Shatner takes his turn roasting Sheen.   (Allen J. Schaben / Los Angeles Times)

Actor Charlie Sheen turns the tables and roasts his guests.   (Allen J. Schaben / Los Angeles Times)

Actor Charlie Sheen laughs as he is roasted.   (Allen J. Schaben / Los Angeles Times)

Roast master Seth MacFarlane, right, laughs as actor Stephen “Steve-O” Glover celebrates breaking his nose after ramming into Mike Tyson‘s fist.   (Allen J. Schaben / Los Angeles Times)

Boxer Mike Tyson takes his turn roasting Charlie Sheen.   (Allen J. Schaben / Los Angeles Times)