Sometimes and director Lawrence Kasdan's loose, laconic comedy "Darling Companion" is one of those times it's fun to see movie stars in the same way we see old friends.
When we see Kevin Kline and Diane Keaton playing an established married couple, Joseph and Beth Winters, we buy into it not because we've ever seen them together before (we haven't; this is their first screen pairing), but because we know their onscreen personae over the years and our minds can play cinematic matchmaker and know intuitively that they would pair up well. Same goes for the great character actors Dianne Wiest, who plays Joseph's New Age-y sister Penny, and Richard Jenkins, who plays Penny's recently acquired boyfriend, Russell.
Joseph and Beth are in a marriage slowly drifting. Joseph's a talented surgeon who never has time for Beth, who is feeling the empty nest left behind by their daughters, Grace (Elisabeth Moss) and Ellie (Lindsay Sloane). On the drive from the airport, after dropping Ellie and her baby off, Beth and Grace find a dog abandoned in the highway median. They take him to a nice vet, Sam (Jay Ali), and soon Beth is adopting the mutt, naming him Freeway.