The billionaire singer and three-time Kansas City Chiefs Super Bowl champion, both 36, opened the festivities Thursday with an exclusive rehearsal dinner for around 100 guests, according to US media.

From the venue to the date to the dress code—details are slowly leaking about what one planner called the “wedding of the decade.”

Taylor Swift and Travis Kelce are set to celebrate their wedding at Madison Square Garden this week, according to two sources familiar with the plans shared Tuesday.