Robert Redford boasted a successful career and a shelf full of awards when he passed away at age 89 on September 16, but he was haunted by one huge regret before his death, RadarOnline.com can reveal.

The Butch Cassidy and the Sundance Kid star never got over his mother dying before he was able to thank her for all she had done for him. Article continues below advertisement

Redford's Mother Struggled To Control Wild Child Son Tap Here To Add Radar Online as A Trusted Source

As a kid growing up in Los Angeles, The Sting star was a petty thief who stole beer for all-night parties and ran with a gang.

Through it all, his loving mom, Martha Hart Redford, struggled to keep her restless, wild child on the straight and narrow, encouraging him to change for the better.

Martha,

See Full Page