Rachel Ryan is a American porn actress that also went under the names Penny Morgan and Penny Moore. She appeared in over 100 adult videos between 1985 and 1992.

Many of her scenes involved anal sex, and because of her willingness to engage in this act, she earned the nickname "rubber rectum ryan" among others within the adult film community.

She was known to have had a rivalry with porn actress Patti Petite, and it was during the production of "Rambone: The Destroyer" co-starred with her in the opening and closing scenes. Instead of fighting, these two porn legends took revenge on each others genitals, in some of the hardest dyke action to come out of the eighties. These scenes involved rimming, breast bitting and anal penetration with a large dildo.

Her birth name was Serena Robinson, and she used it when she first started out in the business. She eventually had extensive plastic surgery on both her face and breasts and adopted the screename Rachel Ryan. By 1991, she had her boob enlargement reduced due to health concerns. She is also known to have had affair with mainstream actor Michael Keaton.

On April 27, 1992, she married comic actor Richard Mulligan, but this union only lasted two years. Regardless of her failures in her personel life, she had a penchant for anal sex, and is well known for being one of porn's first anal queens.