"She actually was a costar of mine on Baywatch," the actor, 30, said during a Tuesday interview on SiriusXM's Howard Stern Show. "She did a couple guest starring roles."
Over time, the costars eventually developed feelings for each other. "We messed around," Jackson admitted of their two-year relationship. "She was kind of like my first crush, puppy dog love."
Calling Williams his "secret rendezvous girlfriend," Jackson added that many of his first sexual experiences were with the actress, now 30. "I was learning the ropes, man," Jackson said. "If you want to make an omelet, you've got to break some eggs, right?"