Tommy and Timmy, played by Steven and Philip Ross, are characters seen on Beverly Hills, 90210, the first series of the Beverly Hills, 90210 continuity. They appeared in the first season episode The 17 Year Itch.
They are identical twins who participate in a U.C.L.A. study on twins performed by Harriet Strathmore, which also includes Brandon and Brenda Walsh. Contrary to Brandon and Brenda, they seem to share a cohesive thought process, often knowing what the other thinks and claiming to have some sort of psychic connection. They were separated at birth. When Tommy was five years old, he had a stomach ache, all while Timmy was about to have appendicitis.