Former "Falcon Crest" hunk LORENZO LAMAS is hoping the fifth time’s the charm with wife 5.

The 52-year-old actor is about to tie the knot with his 23-year-old fiancee, Shawna Craig, and he’s asked his formerly estranged son A.J. – who slept with Lorenzo’s fourth wife – to be his best man!

The ENQUIRER has learned the exclusive details of the couple’s impending nuptials, which will take place over the July 4th weekend on Catalina Island off the coast of California.

"They’re marrying at the historic Avalon Hotel," a family friend revealed to The ENQUIRER.

"They’ve planned an intimate ceremony overlooking the ocean with a small reception to follow.

"It’s certainly not going to be anything over the top. They’ve invited only about 30 people."

The wedding will mark a father-son reunion.

The two stopped talking last year after it was revealed on Lorenzo’s cable reality show, "Leave It to Lamas," that A.J. had carried on a torrid affair with his dad’s then-wife, busty former Playmate Shauna Sand, when he was just 18.

The deception "was like a knife to his heart," the friend said, "but Lorenzo has always been a terrific father, and having his son stay away hurt him even more.

"They recently sat down for a heartfelt man-to-man talk, and they ended up hugging out their resentment. Now they’re closer than ever."