Sad! I just found out. I agree with Elle's comment; it's hard enough having a new relationship and baby much less being in the spotlight AND traveling too much/having too much fawning attention being directed at you. Most people have a 50-50 shot at a lasting marriage, but I'd say Hollywood couples have more like a 1 in 10 chance.
Other long-termers include Tom Hanks & Rita Wilson (17 years I think) and William H. Macy & Felicity Huffman (10 years).