Seems Tyreek Hill's already moved on from his estranged wife, Keeta Vaccaro ... check out this video TMZ Sports has obtained, the NFL star looked awfully flirty with a mystery woman in Orlando on Sunday.
The fun in the sun between the Miami Dolphins receiver and his gal pal went down at Evermore Bay Resort ... as Hill was apparently enjoying some family time at one of the facility's community pools.
Launch GalleryPoolside Chillin' Launch Gallery TMZSports.comMultiple witnesses tell us Hill got there first .