Mary Lou Metzger (born November 13, 1950) is an American singer and dancer best known as a cast member on The Lawrence Welk Show.
The family moved to Havertown, Pennsylvania, where at the age of seven Metzger officially began her performing career, which included appearances on The Ted Mack Amateur Hour and acting in a national tour of The Music Man.
[citation needed] During her twelve years on the show, she sang as part of a female trio with fellow Welk stars Gail Farrell and Sandi Griffiths, various group numbers, and song-and-dance numbers with Jack Imel; she also danced with the maestro himself at the end of each show.
After the show ended its regular run on television, she continued to pursue acting, which included commercials, and parts on both the small and the big screen, such as Garry Marshall's 1999 film The Other Sister.
Through much of the late 2000s, she hosted the wraparounds of the show featuring interviews with members of the Musical Family, conducted by Metzger herself.