Lily Tomlin is a powerhouse in this sweet, funny, thoughtful relationship movie written and directed by Paul Weitz (About a Boy). When her granddaughter Sage (Julia Garner) turns up needing an abortion, Elle (Tomlin) springs into action as the two visit a number of Elle’s friends and acquaintances trying to borrow the money. There’s terrific support from Marcia Gay Harden as Elle’s daughter and Sage’s mother, and from Sam Elliott, who takes us well beyond that lovable growl of a voice to uncover layers and depths of character he’s seldom called upon to tap. Grandma suffers a few awkward moments, but for the most part it stays sharp. Weitz does interesting things with old movie conventions about lesbian relationships and abortion, weaving them into a story that borrows from tried-and-true familiar formats — it’s a bit of a road movie, a bit of a buddy movie — and then quietly goes its own way. Rated R. 79 minutes. Violet Crown.