Happy birthday, Fe-he-he-heeny!

Albert L. Ortega/WireImage

William Danielscelebrates his 98th birthday on Monday, March 31.

Also on the agenda today?

William Daniels attends The Hollywood Show held at Westin LAX Hotel on February 10, 2018 in Los Angeles, California.

William Daniels.Credit:Albert L. Ortega/WireImage

“I’m sure there are lots of couples out there on farms or businesses, other things.

Doctors don’t live that long, but a married couple that are actors living that long?

That’s special.”

Bonnie Bartlett and husband actor William Daniels visit Hallmark’s “Home & Family” at Universal Studios Hollywood on October 25, 2017 in Universal City, California.

Bonnie Bartlett and husband actor William Daniels.David Livingston/Getty

Elsewhere(which also starred his wife, Bartlett) and as the voice of K.I.T.T.

they captioned the photo.

“Lets all celebrate an icon on his day.”

At 98 years young, Daniels told PEOPLE he still enjoys his work.

I hope I’m around a little longer and we’ll do it again next year."