The Gavin and Stacey star became engaged to long-term girlfriend Julia Carey in December 2010, and the pair are said to have chosen a venue.
The couple will allegedly wed at Babbington House in Somerset, the home of various celebrity weddings including Zoe Ball and Amanda Holden, reports The Sun.
Corden has reportedly invited a host of celebrity friends including David Beckham, with whom he appeared in a special Sport Relief sketch in 2010.
"James has been trying to get this sorted for a while as he's crazy about Julia," a source said.
"But his packed work schedule has been a nightmare to fit around. The bash will be a no-expense-spared event, as he has done very well for himself over the years."
The couple recently postponed wedding plans due to Corden's role in the Broadway run of One Man, Two Guvnors, for which he was recently nominated for a Tony Award.
Corden and Carey welcomed their first child together in March 2011.
Watch James Corden and David Beckham in a Sport Relief sketch below: