Taylor Swift's wedding performers revealed... including a heartthrob with a VERY special connection to her past

and have allegedly enlisted the bride's old friends and Tim McGraw to perform at their wedding next week.

Details of the nuptials have been kept so assiduously under wraps that Swift, 36, is said to have taken the precaution of inviting guests over the phone instead of risking the paper trail involved in sending out cards. 

However the Daily Mail reported earlier this month that the pop star and the NFL player will throw a wedding function at Madison Square Garden next Friday, July 3.

Whispers circulated this week that the couple are planning a smaller gathering for about 100 intimates at the arena on Thursday, July 2, followed by a more extravagant affair with roughly 1,000 attendees the next night, via the New York Times.

Now insiders have claimed McGraw, 59, and Nicks, 78, will play a 'Wedding-palooza' one source characterized as 'bigger than the ,' per Page Six.

Swift first rose to fame in 2006 with a wistful song called Tim McGraw, which .

The Daily Mail has contacted Swift's representative for comment. 

Then in 2007, while she was establishing herself as a pop idol, Swift

'Faith and I both knew that there was no stopping her,' McGraw recalled a few years ago to Entertainment Tonight Canada. 'She’s a special talent.'

Earlier this month, Swift went viral for wearing a Stevie Nicks t-shirt to Madison Square Garden while attending Game 4 of the NBA Finals