2:19 PM PT -- David's listing the date of separation as Feb. 1, 2019, according to his divorce filing, and he's also asking for joint legal and physical custody of their 3 minor kids -- 13-year-old twins William and Audrey, and 8-year-old Eve.
David Koechner, famous for playing Champ Kind on "Anchorman," is calling it quits on his marriage ... he just filed for divorce. Whammy!!!
According to court records, David filed docs Tuesday in L.A. Superior Court to divorce Leigh Koechner after more than 20 years of marriage.
The exes have five kids together, including minor children ... which could make the divorce a lot more complicated.
David and Leigh initially met on an airplane, and they tied the knot way back in June 1998. It's unclear what led to the split.
Oh and get this ... Leigh is a motivational speaker and she's currently teaching a 6-week webinar on divorce.
David's ex claims she can help people who are going through a divorce, people who are thinking about getting a divorce, people with close friends getting divorced and people who are suffering after a divorce.