Alec and Hilaria Baldwin are reportedly buying a $16.5 million penthouse.

Alec and Hilaria Baldwin

Alec and Hilaria Baldwin

The couple - who will welcome their third child together later this year - have expressed an interest in the property in West Chelsea, New York, which is owned by 'Soprano's creator David Chase.

A source told the New York Post's Page Six: "Alec has seen the apartment at least three times, and he has been hanging out in the lobby asking residents about the building and what it's like to be there."

The 5,000 sq ft property has five bedrooms, and four and a half baths but there could be one snag if Alec, 58 and Hilaria, 32, go ahead with the purchase.

The insider added: "What Alec may not know is there is a communal roof terrace above that penthouse, so everyone can look down and see him sunbathing naked on his terrace - should he choose to do so."

Meanwhile, Hilaria revealed in March that she and Alec are expecting their third child together.

The couple already have Carmen, three, and 14-month-old Rafael together, while Alec also has daughter Ireland, 20, from his marriage to Kim Basinger.

Taking to Instagram, Hilaria announced proudly: "Ireland, Carmen, Rafael, Alec, and I are excited to share with you that we are going to have another addition to our family. A little boy coming this fall #366daysoflivingclearly #HilariaLCM (sic)"

Speaking about his wife previously, Alec said: "I love my wife more than anything. I love our family, I'm very happy. I've never been happier before in my life ... Even my daughter Ireland has been visiting and we see her falling more in love with Carmen every day. It's really fun. This is the best time of my life and I owe it all to my wife, truly."