Patrick William Cassidy (born January 4, 1962) is an American actor and singer best known for his roles in musical theatre and television.

[7] Also in 1981, he co-starred in the made-for-TV movie Midnight Offerings as the love interest of two dueling teenage classmates who happen to be witches, played by Melissa Sue Anderson and Mary Elizabeth McDonough.

[10] In 1986, Cassidy played a cadet at a military academy in Dress Gray[11] and appeared in the holiday TV movie Christmas Eve with Loretta Young.

He co-starred alongside his half-brother David in a 2009 ABC Family comedy series entitled Ruby & The Rockits created by his brother Shaun.

[20] Cassidy's next Broadway role was Jeff Barry in the Ellie Greenwich jukebox musical Leader of the Pack, which opened in April 1985.

In 1993, Cassidy starred as Bobby opposite Carol Burnett in a Los Angeles production of Sondheim's musical Company.

[28] He later reprised his role of Frank Butler alongside Patti LuPone and George Hearn in August 2010 concert presentations at the Ravinia Festival in Illinois, directed by Lonny Price.