Ryan was born in Pomona, California to Anita Lynne Rultenberg and Sean Patrick O'Donohue. He has acted in Community Theatre until he was 9 years old. He got interested in professional acting after his 9th birthday. He wanted his father to buy him a new Sega Genesis Video Game. His Father told him he could not afford to buy him video games more than a few per year. He told him to get a job. Ryan's response was, What can I do? He was told he could do paper routes or cut lawns as his father had done when he was his age. Ryan responded with: You need a car to deliver newspapers and illegal aliens do all the lawn cutting around Southern California. His father said that he could try acting, because we lived around Los Angeles, but that it was a long shot and don't expect anything to happen for a long time. Also if you are going to persue this the only help his father was to offer was to pay for pictures and drive Ryan to auditions. All telephone calls and appointments were going to have to be made by Ryan in order to prove his interest. Ryan took care of contacting agents and photographers and within one month of getting his Agent, Ryan and his Dad were filming Ryan's first prime time series in Hawaii called "The Byrds of Paradise". After returning from Hawaii, the show was cancelled after the first season. Ryan got a part in the movie "Tales of the Crypt: Demon Night". He then got a voiceover part with Disney for Simba the lion for all video games and story books. Ryan starred in the CBS series "The Boys are Back" with Suzanne Pleshette and Hal Linden.
