Chaz Bono
Cher's son played the reverend who married Steffy and Wyatt in 2016. The Sonny & Cher Comedy Hour taped in B&B's studio in the 1970s, proving "The Beat Goes On."
Christopher Knight
Here's the story … of The Brady Bunch's Peter acting as a doctor treating Bridget and Owen's baby in 2010.
Bob Barker
The former host of The Price Is Right let Wyatt have it in 2014 after Wyatt called him an "animal wacko." Bragged the now-99-year-old: "I've still got it."
Gina Rodriguez
In 2011, 20 years after Stephanie suffered a stroke and wound up homeless in L.A., B&B revisited the theme with Rodriguez (now of Jane the Virgin fame) as homeless shelter resident Beverly.
Betty White
Stephanie (Susan Flannery) and Pam (Alley Mills) were surprised when their estranged mother, Ann, suddenly appeared in 2006, but not as shocked as viewers were when the role was played by Golden Girl White.
Dawn Wells
In 2016, Gilligan's Island sweetie pie Mary Ann played a Forrester buyer.
Morgan Fairchild & Co.
Fairchild (far left) hosted a 2009 fashion face-off with judges Alan Thicke, Melissa Rivers and Jim J. Bullock.
Fred Willard
Willard turned up in 2014 as Eric's brother John Forrester. The traveling salesman was in town to visit his daughter Ivy and encourage Eric (seen fitting a model) to find love again after Stephanie's death (advice Eric took very much to heart).
Hal Linden
In 2006, Linden played a ship captain who dallied with Jackie.
James Doohan
Star Trek's Doohan (Scotty of "Beam me up, Scotty!" fame, left) played Scotsman Damon Warwick in 1993 and from 1996 to '97. In related news, Damon's son James (Ian Buchanan, far left) was doing some beaming of his own when he finally lost his virginity in his 30s — to Taylor, after an earthquake.
Drew Carey
In 2009 Donna (Jennifer Gareis) won big on The Price Is Right with Drew Carey. (Price tapes down the hall from B&B.)
Usher
In 1998 Amber slept with singer Raymond (played by singer Usher) — and the pair also performed a duet version of his hit "Slow Jam." When she got pregnant, she wasn't sure if it was by Raymond or Rick. (The baby, Rick's, was stillborn.)
Mario Lopez
Lopez saved lives as Lorenzo Lamas's brother Dr. Christian Ramirez in 2006.
Patrick Duffy
Dallas star Duffy played Brooke's father, Stephen, from 2006 to 2011, heroically supporting ex-wife Beth (Robin Riker) when she was diagnosed with Alzheimer's in 2008. He is currently referred to as living in Dallas. Wink!
Linda Gray
But Duffy wasn't the only Dallas star to go Bold: Gray played Priscilla Kelly in 2004.
Michael Buffer
The wrestling ring announcer (in the tie) got ready to rumble with Liam, Katie and Bill at a 2010 Spencer business event.
Monica Horan & Jim O'Heir
Everybody Loves Raymond's Horan (left) and Parks and Recreation's O'Heir got laughs as a wacky married couple who tortured Quinn on a 2016 flight to Monaco.
Charlton Heston
Heston (with Sally) emceed Forrester's 1993 "Salute to Hollywood" fashion show.
Jayne Meadows & Steve Allen
Meadows and Allen were also in attendance at the "Salute to Hollywood" fashion gala.
Fabio
Fabio, already established as a friend of Sally's, popped in on her 1993 bachelorette party and smooched Darla (Schae Harrison).