Kelsey Grammer's Bride Wore White ... Bathrobe!

Kelsey Grammer's latest wife Kayte Walsh arrived to her Broadway wedding at the Longacre Theatre today in a white bathrobe.

Kayte Walsh in Wedding Day
The fourth Mrs. Grammer likes to keep it casual.

Kelsey's rep sent out a statement at 1:30 PM PT, confirming the couple tied the knot. Hazah!

UPDATE -- Our photog spotted Kelsey and Kayte in the Plaza Hotel, right after they exchanged vows.