Denise Austin's swimsuit model daughter is officially off the market ... the fitness icon's offspring got married over the weekend -- and the wedding was a lavish one.
Katie Austin -- who followed in Denise's footsteps as a workout instructor before becoming a Sports Illustrated bathing suit beauty -- tied the knot on Saturday in La Quinta, Calif. with her longtime partner, Lane Armstrong.
The two got the nuptials done outdoors at the Austins' desert property ... amid a myriad of flowers, chandeliers and string lights.