JEN'S GETTING MARRIED...

but Bennifer aren't invited!

For two very public exes, Jennifer Garner and Ben Affleck have done a good job of keeping things cordial between them. But the actress draws the line at inviting her ex-husband to her next wedding! Insiders tell New Idea that an excited Jen, 51, is getting set to wed her businessman beau, John Miller, after five years of dating on and off. And even though she's on relatively good terms with Ben and his new wife, Jennifer Lopez, there's just too much water under the bridge between them all for Jen to extend a wedding invite.

The insider adds, "Jen and John don't want to invite Ben and J.Lo, but they feel like they may have to. They were invited to their wedding but courteously declined and will no doubt be hoping Ben and J.Lo do the same."