The actor, who plays Steve McDonald in the ITV1 soap, wed yesterday at St Bartholomew's church in Wilmslow, Cheshire, followed by a reception at Capesthorne Hall in Siddington.
Gregson was spotted walking through The Cottons hotel following a spa treatment yesterday morning. A hotel guest said: "I couldn't believe it when I saw Simon in reception wearing this full-length dressing gown. It was truly bizarre seeing Steve McDonald dressed so oddly.
"On the Friday night he was spotted in the bar at the hotel having a few pints of Guinness with pals."
Guests at the ceremony included Katherine Kelly (Becky McDonald), Michelle Keegan (Tina McIntyre), and Michael Le Vell (Kevin Webster). Gregson's on-screen mum Beverley Callard (Liz McDonald) was unable to attend as she is on honeymoon after marrying last month.
Gregson and his bride already have two sons together, aged three and one.