Ryan Lee Guldemond (born November 24, 1986)[1][additional citation(s) needed] is the lead vocalist, songwriter and guitarist of the Canadian indie rock band Mother Mother, which he formed on Quadra Island, British Columbia with his sister Molly Guldemond (on vocals and keyboard).

[6] He recruited his sister, Molly, along with a friend from college, Debra-Jean Creelman, to accompany his vocals for the songs they had written.

The trio played as an acoustic act in Vancouver in January 2005 before adding drummer Kenton Loewen and bassist Jeremy Page to form Mother, a 5-member band.

Guldemond played an unnamed character in the movie Hot Tub Time Machine alongside ex-Mother Mother bandmate Jeremy Page.

[9][10] Guldemond is also an experienced music producer, having worked with Hannah Georgas on her album, This Is Good[11] In 2022, Guldemond started his solo project GLDMTH (pronounced "gold mouth"), focusing on acoustic songs with lyrics portraying beauty in everyday life.