Diana Dennis (born July 21, 1951) is a former professional female bodybuilder from the United States.
Her earliest success was in mixed pairs competition (where couples do synchronized posing routines to chosen music), with partner Kevin Lawrence.
Dennis earned her pro card by winning the overall title at the 1985 NPC Nationals.
She then established herself as one of the top professional competitors by finishing third in the Ms. Olympia later that year.
She competed in a total of nine Ms. Olympia contests, finishing outside the top ten only once.