David Letterman's Mother and 'Late Show' Regular, Dorothy Mengering, Dies at 95

David Letterman's mother, Dorothy Mengering, died at the age of 95, a rep for the Letterman family confirmed to CBS News.

Mengering was a regular guest on The Late Show when Letterman was hosting, and made her first appearance on the show during the 1994 Winter Olympics, according to The Hollywood Reporter, and went on to be a correspondent for the Nagano, Japan and Salt Lake City winter games in addition to doing a segment for the London Olympics.

WATCH: David Letterman Gives Emotional, Star-Studded Farewell to Late Show

Often referred to as "Dave’s Mom” or “Dave’s Mom Dorothy" on The Late Show, she appeared in a Thanksgiving segment called "Guess Mom's Pies," and often made Mother's Day visits as well as participated in "Top 10" lists. She also published a cookbook in 1996 called Home Cookin’ With Dave’s Mom.

On Tuesday, Stephen Colbert, who is the current host of The Late Show, tweeted out his condolences, writing: "I'm so sorry to hear of Dorothy Mengering's death, and so grateful that Dave shared her with us."

WATCH: Stephen Colbert Gives Tearful, On-Air Eulogy To Mother Lorna

News of Mengering's death sadly comes the same week as Letterman's birthday. He turns 70 on Wednesday, April 12.

WATCH: David Letterman Suggests Late Show Should Have Gone to a Woman After He Retired