Robin William's best ad-lib moments We've rounded up nine of Robin Williams' best ad-lib moments throughout his career. Photo: Reuters

Robin Williams was found dead on Monday in his home in Tiburon, California, according to the Marin County Sheriff’s Department. The actor was 63 years old at the time of his passing. Not only does the Oscar-winning actor leave behind a wife and three children, but also a historic career -- one that has touched fans of all ages.

In honor of the late, great comedian, IBTtimes has rounded up nine of his best ad-lib moments from throughout his career -- moments that proved just how talented, creative and loved Williams was in the entertainment world.

1. “Aladdin” – According to reports, the 1992 Disney film was turned down for a Best Adapted Screenplay Academy Award nomination because Williams had ad-libbed so many of his lines as the goofy but loyal Genie.

2. “Good Will Hunting” – Remember Williams’ last line in the 1997 film? The actor allegedly ad-libbed the entire thing, as well as the scene of Sean telling Will about his wife’s gas problem. In the original script, Williams’ character was supposed to tell Will a story about how his wife would turn off an alarm clock in her sleep. We like Williams’ version better.

3. “The Tonight Show Starring Johnny Carson” – Williams’ first appearance on Johnny Carson’s late night talk show, on Oct. 14, 1981, was iconic for many reasons – one being his amazing improvisation.

4. “TED Conference” – Another moment where Williams showed off his quick and clever tongue was during a TED BBC Conference held in California in 2008. When the discussion started experiencing technical difficulties, Williams bravely stepped into the spotlight from the crowd to come to the panel's rescue. 

5. “Mork & Mindy” – It was reported that Williams' ad-libbing was so brilliant on the 1970s TV series that writers would often leave blank moments throughout the script for the actor to fill with his own banter.

6. “Mrs. Doubtfire” – AMCTV revealed that many of the movie’s best lines were ad-libbed by Williams during the 1993 comedy.

7. “Good Morning, Vietnam” – Reports suggest that Williams ad-libbed all of Cronauer’s broadcasts in the the 1987 drama.

8. "Jack" - The film’s director, Francis Ford Coppola, revealed to the Christian Science Monitor in 1996 that Williams' ad-libs in the movie were sometimes a little too racy! 

"The easiest thing about working with Robin was encouraging him to improvise, for he's brilliant. When he began to ad-lib, it was screamingly funny, but occasionally he would flip into an older sensibility, and I had to say, 'Whoa, a 10-year-old doesn't know that yet,’” Coppola revealed.

9. “The Crazy Ones” – Creator David E. Kelley told Starpulse that he encouraged Williams to ad-lib whenever possible during the TV sitcom.

What were your favorite moments of Robin Williams on the big and small screen? Let us know in the comments section below.