Her big claim to fame was as the evil, murderous child, Rhoda Penmark in the Broadway and film productions of The Bad Seed. From there she went on to play Helen Keller in the Playhouse 90 adaption of The Miracle Worker and then landed the lead role in the short lived television series, Peck's Bad Girl.
Patty McCormack continued to work and grew up virtuously unnoticed by the public, appearing in a wide variety of television shows that ranged from One Step Beyond to Route 66 and from The Wild Wild West to Barnaby Jones, just to name a few.
She's still working and has been featured in many televisions shows and movies like The Sopranos as well as the Oscar nominated film, Frost/Nixon, where she played Pat Nixon. Patty McCormack may not be as well known now as she was as a child, but she has endured and is living proof that you don't have to be famous to be a working actor.