Robert L. Webber (October 14, 1924 - May 19, 1989) was an American actor who starred as Juror #12 in the 1957 movie 12 Angry Men.

Webber was born in Santa Ana, California, the son of Alice and Robert Webber, who was a merchant seaman. He was a U.S. Marine during World War II serving on Guam and Okinawa. Webber led a forty year career as a character actor during which he also played with Dudley Moore in 10 (1979) and as Alexander Hayes, father of Maddie Hayes (Cybill Shepherd), in the hit series Moonlighting. Other notable turns were in the movies The Dirty Dozen where he played a general who bullied Lee Marvin and as one of the many LA low lifes Paul Newman encounters in the anti-hero saga, Harper.

Webber was married to actress and model Miranda "Sammy" Jones in the late 1950s and was divorced in the early '60s. He died from Lou Gehrig's disease at age 64 in Malibu, California.

Over his 40-year career as one of Hollywood's veteran character actors, Robert Webber always marked his spot by playing all types of roles and was not stereotyped into playing just one kind of character. Sometimes he even got to play a leading role (see Hysteria (1965)). Webber first started out in small stage shows and a few Broadway plays and served a stint in the army before he landed the role of Juror 12 in 12 Angry Men (1957). He was also known for numerous war films, playing Lee Marvin's general in Dirty Dozen, The (1967) or as real-life Admiral Frank J. Fletcher in Midway (1976). Webber's other best known movies include Great White Hope, The (1970), Revenge of the Pink Panther (1978), 10 (1979) (as Dudley Moore's music assistant), Private Benjamin (1980), Wild Geese II (1985) and co-starring with Richard Dreyfuss and Barbra Streisand as prosecutor Francis McMillian in Nuts (1987). In 1989 he died of Lou Gehrig's disease (amyotrophic lateral sclerosis) in Malibu, California, shortly after completing the 1988 TV production Something Is Out There (1988) (TV). He bore a resemblance to character actor Kevin McCarthy (I).