Madcap comedian and actor Robin Williams was immortalized this week with a star on Hollywood's Walk of Fame.

"This is Robin Williams Day - everything is free!" Williams yelped to a gathering of fans as he paraded around his star, embedded in the sidewalk in front of the Mann's Chinese Theater on Hollywood Boulevard.The actor-comedian's star, the 1,926th on the Hollywood Walk of Fame, filled the last available space directly in front of the landmark movie house.

Williams, 38, whose quicksilver wit first found a national audience on television in the guise of a frenetic extra-terrestrial in the series "Mork and Mindy," was accompanied by his wife and his daughter, Zelda.

Williams honed his manic, improvisational humor in nightclubs and then took it to television and movies, winning an Oscar nomination as best actor in 1988 for his portrayal of a fast-talking disc jockey in "Good Morning, Vietnam" and in 1990 as an English teacher in "Dead Poets Society."

Since 1986, Williams has been active in the planning and performance of "Comic Relief" benefits to aid the homeless.