Ashton Kutcher "pissed" Laura Prepon kept her engagement a secret

Maybe Ashton Kutcher and Laura Prepon aren't as tight as he thought.
The actor guest co-hosted Live!
with Kelly Ripa Friday when Prepon's recent engagement to Ben Foster came up.
I'm very upset with her right now.
She just announced this engagement, and I had to find out in the news!
She's my friend.
It's weird like that.
By the way, it's not just a random engagement.
It's an engagement to another friend of mine!
So, now I'm double upset that neither of them told me.
I got off the plane in New York like, 'What?
To be fair, Kutcher kept his engagement to Mila Kunis a secret from Prepon back in the day.
When Mila and I got engaged, Pre was like, 'What?
This is crazy!
You guys, it was like 20 years ago.
You were friends and no one saw this coming, and now you're engaged and I have to find out this way.
Later, after the actors hugged, Kutcher told Prepon, "I am so pissed at you!"