Jason Alexander, who costarred with Courtney Stodden in a suggestive comedy sketch when she was a teen, is apologizing for the performance.

'Seinfield' star Jason Alexander was accused by Courtney Stodden of being inappropriate with a minor when they filmed a 2012 comedy sketch.

Stodden, now 31, was the target of tabloid scrutiny and public shaming at the time due to her age-gap marriage to The Green Mile actor Doug Hutchison, who married her when she was…