Heidi Montag and Spencer Pratt eloped in Mexico on Nov. 20 -- but Heidi forgot to fill in her dad about the news!

When asked if he'd heard about the quickie marriage, Bill Montag told Life & Style on Monday, "No, I haven't heard from them. I've only heard about it because people have been calling me!"

Asked how he feels about it, he said, "I don't know. I have to see what happens. I got a text message from Heidi the other day, but that was it. I talked to her last week and she said they were going down there for a vacation for the weekend -- that's what she said.

"I like Spencer," Bill continued, "so it would be fine. I was hoping they would get married in a regular type of thing, like a church wedding.

"I certainly would want her to have another ceremony for people and her friends. We want to have a nice thing for her, that's for sure.

"Unfortunately, she's just like her father. She just kind of does what she wants to do, and that's the way she is."

Photo Credit: WireImage