The team will also be filmed sending the issue to print by the BBC as part of the broadcaster's post-Wedding coverage.
Grazia's style director Paula Reed will be working with the BBC team live outside Westminster Abbey and Buckingham Palace as their fashion spokesperson on the key fashion and style moments of the day.
The team will be blogging throughout the day, with live arrival shots of the best dressed guests and behind-the-scenes pictures at Grazia HQ on graziadaily.co.uk, as well as tweeting on twitter.com/grazia_live.
Jane Bruton, editor-in-chief of Grazia, said: "This is a first for Grazia and we will be at the centre of the action, bringing our readers the very best from the big day.
"With a team of reporters at the scene and the finest fashion experts in the industry, we will deliver an insightful, authoritative and exciting issue.
"To have Paula commentating for the BBC on the day is a huge coup for both her and Grazia and illustrative of how influential the brand has become in covering hot news and fashion as it happens."
Bauer's magazine is the latest brand to incorporate Prince William and Kate Middleton's Big Day into their plans. For more royal coverage click here.