Tim Robbins and Susan Sarandon have split up after 23 years. The liberal luminaries never married, but they have two sons, ages 17 and 20. The two “have announced that they separated over the summer,” a Sarandon rep tells People. Past that, “no further comments will be made.” The two met while filming the baseball flick Bull Durham. Sarandon is 63, and Robbins 12 years her junior.