Comedian and writer Fry, 57, has given formal notice to wed Mr Spencer, 27, at a register office in Dereham, Norfolk, near where he grew up.
Writing on Twitter after The Sun newspaper revealed the marriage plans, Fry said: ?Oh. It looks as though a certain cat is out of a certain bag.
?I?m very very happy of course but had hoped for a private wedding. Fat chance!?
The pair are thought to have started their relationship last year.
Fry, a director of Norwich City Football Club, has been a familiar face on television since the 1980s and is most recently known for presenting the comedy quiz show QI, as well as for acting roles in The Hobbit and the latest series of 24.
His personal assistant said: ?Stephen Fry is very happy and proud to say that he has set the wheels in motion for a wedding sometime in the future but no date has been set due to a busy work schedule.?
According to documents on display in Norwich, the wedding will take place in Breckland Business Centre, which houses the register office.
The ceremony room is the ?outstanding feature? of the building, according to the Norfolk County Council website.
It says: ?Decorated in a modern style, in shades of turquoise, lilac and purple, there is seating for 40 people.?
On the paperwork, Fry gives his occupation as an actor, while Mr Spencer is listed as a writer.
Fry, who has spoken openly about his struggles with drug abuse and depression, has largely kept his love life private, although he reportedly separated from a long-term partner five years ago.
He has also spoken about a suicide attempt in 2012 which saw him take ?a huge number of pills and a huge (amount) of vodka? while filming a documentary about homophobia around the world.
Source: BBC
