Justin Portman, 50, married 36-year-old actress Morgan Snyder this week in a quiet Herefordshire ceremony.
The nuptials were described by Mr Portman - son of the late 9th Viscount Portman - as a 'shotgun wedding' because his wife is heavily pregnant and expecting their first child next month.
Mr Portman, whose family own much of London's Marylebone, was previously married to supermodel Natalia Vodianova, 37, with whom he has three children.
Hon. Justin Trevor Berkeley Portman (b 1969), son of Edward Henry Berkeley Portman, 9th Viscount Portman of Bryanston and Penelope Anne Hassard Allin. He is a half-brother of the current (10th) Viscount.