The McFly musician tied the knot with his childhood sweetheart at a ceremony at One Marylebone, a 19th century Grade I listed former church built by Sir John Soane.
Harry Judd, Dougie Poynter and Danny Jones joined Fletcher as his co-best men at the church.
Falcone's siblings Mario and Giorgina - who have both appeared in The Only Way is Essex - also attended the ceremony yesterday (May 12).
Fletcher's McFly co-stars were photographed outside the venue along with the rest of the bridal party.
However, Fletcher and Falcone themselves were kept under wraps, presumably to keep them hidden for a future magazine deal.
Other guests included Fearne Cotton and her boyfriend Jesse Wood, Busted singer Matt Willis and Inbetweeners actor Joe Thomas.
Mario Falcone's girlfriend Lucy Mecklenburgh tweeted: "Off to @giovannafalcone & @tommcfly wedding! What a beautiful day .. Gi is going to b the most stunning bride :-) xxx (sic)."
Earlier today (May 13), Fletcher wrote to his Twitter fans: "Thanks for all your messages yesterday. We had the most INCREDIBLE wedding with our friends and family. I am the luckiest husband EVER!x"
Before the wedding, Fletcher had joked on Twitter: "I'm sure I'm meant to be doing something today."
Falcone later replied: "Naaah! Just your average boring Saturday! Xxxx."
The pair became engaged after Fletcher proposed in April 2011.