Television:
* The Bold and the Beautiful (1990-present): Diamont's most iconic role, playing Bill Spencer Jr.
* Days of Our Lives (1984-1996): Diamont played Brady Black in this long-running soap opera.
* General Hospital (2011-2012): He briefly played the role of Dr. Andrew "Drew" Cain.
* The Young and the Restless (1984-1989): Diamont played Brad Carlton in this popular soap opera.
* The Bold Ones: The New Doctors (1972-1973): He played Mark Taylor in this medical drama.
* The Love Boat (1977-1986): Diamont appeared in multiple episodes of this popular series.
* Fantasy Island (1978-1984): He appeared in an episode of this popular show.
* The Colbys (1985-1987): He played the role of Jeffrey Cole.
* Melrose Place (1993): Diamont had a recurring role in this popular drama.
* Baywatch (1991-1992): He played the role of David Hasselhoff's father in this hit series.
* Beverly Hills, 90210 (1992): He appeared in an episode of this teen drama.
* The Nanny (1994): Diamont guest-starred in an episode of this popular sitcom.
* CSI: Crime Scene Investigation (2001): He appeared in an episode of this crime drama.
* Law & Order: Special Victims Unit (2002): He played a guest role in this crime drama.
* The King of Queens (2004): Diamont had a recurring role in this popular sitcom.
* Entourage (2007): He appeared in an episode of this HBO comedy series.
* The Sopranos (2000-2007): He appeared in one episode of this critically acclaimed HBO series.
Film:
* The Godfather: Part III (1990): He played the role of a young Don Vito Corleone in this film.
* The Last Dragon (1985): Diamont played the role of Sho'nuff in this cult classic film.
* The Power of One (1992): He had a supporting role in this drama.
* L.A. Confidential (1997): He appeared in a minor role in this film.
* The Longest Yard (2005): He had a supporting role in this comedy.
This is not an exhaustive list, but it gives you a good overview of Don Diamont's impressive career in film and television. He continues to be a popular and well-respected actor in the industry.