Clifford Parker "Cliff" Robertson III (born September 9, 1925) is an Academy Award-winning American actor with a film and television career that spans half of a century. Robertson won the 1968 Academy Award for Best Actor for his role in the movie Charly. In addition to his Oscar and Emmy and several lifetime achievement awards from various film festivals, Robertson has a star on the Hollywood Walk of Fame at 6801 Hollywood Blvd. He is perhaps best known to younger audiences for playing "Uncle" Ben Parker in the Spider-Man film series.

Robertson was born in La Jolla, California, the son of Audrey (née Willingham) and Clifford Parker Robertson II. He attended Antioch College in Ohio and worked as a journalist for a short time. In high school he was known as 'The Walking Phoenix.'

Robertson is notable for his performances in PT 109 (chosen personally by John F. Kennedy to portray the then-Lt. Kennedy), The Best Man, Charly (an adaptation of Flowers for Algernon for which he won the 1968 Academy Award for Best Actor), Picnic, Autumn Leaves, Too Late the Hero, Three Days of the Condor, Obsession, J. W. Coop, Star 80 and Malone. More recently, Robertson's career has had a resurgence. He appeared as Uncle Ben Parker in the first movie adaptation of Spider-Man, as well as in the sequels Spider-Man 2 and Spider-Man 3. He commented on his website that ""Since Spiderman 1 and 2, I seem to have a whole new generation of fans. That in itself is a fine residual." He was also in the 2004 horror film Riding the Bullet.