Jenny McCarthy and Donnie Wahlberg are engaged.

After hiding her hand behind the show's desk, Jenny showed off the ring and exclaimed: "I just got engaged!"

She then wept as she recalled the proposal and explained Donnie, 44, had got down on one knee to pop the question.

She said: "This weekend I was sitting with Donnie ... and he went into the other room and Evan out came with a card that said 'Will' and he handed it to me.

"Then Evan ran away and came in with a card that said 'You.' I started crying and then Evan came into the room with the word 'Marry' - but spelled wrong.

"Last Donnie came out with Evan and Donnie's shirt said 'Me' and he got down on his knee ... Of course, I said 'Yes.' In that moment Evan yelled, 'I have another dad!' and it made all of us cry and I feel like the luckiest girl in the world and he's so wonderful."

The couple - who started dating last summer - are unsure when they will marry.

Jenny admitted: "We don't know yet."

She said they were considering August, but her co-host Barbara Walters said they could tie the knot in her New York home if they marry in September.

However, she added: "On the wedding night, you cannot stay in my apartment."

Jenny previously admitted Donnie had made her reconsider her views on marrying again.

She has said: "I've said on every interview that I was like, 'Never get married again ever,' and, of course, you never say never. I think he would be an amazing husband, so if he does, I would for sure say yes. I wouldn't be surprised if I was the one proposing."

Donnie has two sons from his nine-year marriage to Kim Fey, which ended in 2008.