Mary Treen appears in the movie It’s a Wonderful Life as Cousin Tilly. She also guests in three episodes of The Donna Reed Show.

Mary Treen appears in the movie It’s a Wonderful Life as Cousin Tilly. She also guests in three episodes of The Donna Reed Show.

Mary Treen, a popular minor actress, appears with Donna Reed in It's a Wonderful LIfe and in three episodes of The Donna Reed Show.

Mary Treen secured a niche as a minor actress, appearing in It’s a Wonderful Life as well as three episodes of The Donna Reed Show.