The same year that Full House wrapped up, the girls made the movie called It Takes Two, which follows a nearly exact story to that of The Parent Trap.
A few years went by before Mary-Kate and Ashley completed their next projects; a movie and a TV series that both launched in 1998.
Billboard Dad was the name of the movie, and in it, the twins look to find their dad a new girlfriend after he ends up widowed.
Their TV series was called Two of a Kind. It was on ABC for 22 episodes and centered on Mary-Kate and Ashley being raised in Chicago by their widowed dad. A lot of widower plot lines there in 1998.