Steve Martin and Diane Keaton are One Big Happy

It’s been a long time since Steve Martin and Diane Keaton last shared the screen - 13 years, in fact - but now they’re planning a reunion.

The pair is attached to Paramount’s latest spec script acquisition, which the studio nabbed from writers Amy Lippman and Chris Keyser. One Big Happy’s plot is apparently under lock and key, but we do know it’s a family comedy about parents and kids reconnecting despite various obstacles.

Variety is watching the story .