Alec Baldwin has vowed not to have a fourth child with wife Hilaria.

Alec and Hilaria Baldwin

Alec and Hilaria Baldwin

The 58-year-old actor and his spouse - who already have kids Carmen, two, and Rafael, nine months, together - are expecting their third child and think it would be "very stressful" if they went on to expand their brood even further.

Alec - who also has daughter Ireland, 20, with ex-wife Kim Basinger - said: "We had our daughter and we said, 'How could another one of these be wrong?' Then we had our son, and we said, 'How could another one of these be wrong?'

"But now we're thinking, if we had another one, it wouldn't be wrong, but it would be very stressful. We're very lucky, we're very happy."

The '30 Rock' star is keen for his yoga instructor wife to have some "time off" from being pregnant and is planning "a lot of vacations" once she's given birth.

He told People magazine: "I'm very excited, but I want my wife to have some time off...

"I just worry about my wife and I want her to rest. So after this is over, we're going to work hard and play hard. A lot of vacations."

Hilaria joked the couple's baby making was the result of having nothing else to do in their bedroom.

She quipped: "I told him we need to put a TV in our bedroom."