Speculate no more. Joe Scarborough and Mika Brzezinski, the co-hosts of “Morning Joe” on MSNBC whose off-air relationship had been the source of rumors, are now engaged.

An MSNBC spokeswoman confirmed the engagement. In an interview in Vanity Fair, the couple described how their relationship evolved.

“Over the past year and a half, I realized I had to face these feelings and that it was time to stop putting them in a box,” Ms. Brzezinski told the magazine. “It was not an easy process and it was not an easy set of decisions for either of us. It was something I couldn’t deny anymore.”

Mr. Scarborough, who has been married twice before, told Vanity Fair he thought he would “never, ever do this again in a million years.”