The 68-year-old actor has recently signed up for his new movie An Unfinished Life, trying to overcome his fear of bears.
Robert Redford, who was attacked by a grizzly on the set of 1972 movie Jeremiah has recently decided it was high time to face his phobia.
"There was a bear called Tiny, who was a nine foot grizzly and I had a little session with Tiny that I'll never forget", said Redford.
"I was making Jeremiah Johnson and the scene called for me to be chased by a bear.
"The scene got out of hand and the camera had a malfunction and I had to keep running around a tree and the bear got all excited so pretty soon he was really chasing me, and I had to jump into the tree to save my neck", he recalled.
"I would never take a wild animal, particularly a bear, for granted - even if they say it's tame. I would always be cautious and careful.
"I'm aware of people who worked with grizzlies and had many years of experience working with grizzlies suddenly being turned on and attacked. I was very cautious.
"It's not the most comfortable place to be with a nine foot grizzly standing in front of you", added "The Great Gatsby" star.
Robert Redford is set to play Einar Gilkyson, a rancher who rescues a bear from a zoo after it attacks his best friend and leaves him for dead.
His co-stars in An Unfinished Life, directed by Lasse Hallström, are Jennifer Lopez and Morgan Freeman.