Alexie Gilmore, who plays Robin Williams' girlfriend in "World's Greatest Dad," opening this weekend, is busy shooting an episode of "Private Practice" this week.

She plays a dying woman who needs a kidney transplant, and her sister is the only person who can give it to her. She's already had to undergo the torso mold to prepare for her surgery scene.

After that, her character will "cross over."

No, not death. Or, at least, not right away. She's crossing over to "Grey's Anatomy," but she doesn't yet know what will happen to her character on "Grey's."

This is part of the network's multiple-character sweeps crossover plan to boost viewership for both shows. 

Are you intrigued? ABC sure hopes so.

More "Dad" Dish:

It took two women to wax Robin Williams for his "Dad" nude scene.

Video: Elizabeth Snead

Posted by:Elizabeth Snead