As a jump start to her career, Tom guest starred on an episode of Who's The Boss? in 1989. In that same year, she guest starred in an episode of Kids Incorporated. She then became well known in the realm of soap operas for her role as Victoria Newman on The Young and the Restless. Debuting in December 1990, Tom won two Daytime Emmy Awards for Outstanding Younger Actress in a Drama Series in 1993 and 1999, along with nominations in 1994, 1995, 1996, 1997, 1998 and 2000. Tom departed from the role of Victoria on December 17, 2003, citing creative differences. Prior to her departure, she began portraying Kelly Cramer on ABC's One Life to Live, also making brief appearances on All My Children until she departed in 2006. Since 2007, Tom has become widely recognized for her role as Katie Logan on The Bold and the Beautiful; she earned nominations for Outstanding Supporting Actress in a Drama Series in 2007 and 2008, with a win in 2011, followed by her first Lead Actress nominations and wins in 2012 and 2013. Tom has also guest starred on Monk and Ugly Betty and has also worked extensively in theater, both in New York and on the West Coast.