JUST IN: ONE YEAR into their romance; Taylor Swift and Travis Kelce at the ‘Wedding of the Century’ Eagerly UNVEIL…

Now they’re ready for more. A year into their romance — which began last summer when the NFL tight end publicly declared his interest in the Grammy winner on his “New Heights” podcast — Taylor and Travis, both 34, “are still on cloud nine,” says another source. “They can’t believe how lucky they are to have found each other and have discussed making things official.”

Indeed, weeks after a source revealed to Life & Style that Travis has “met with a high-end jeweler several times,” multiple insiders have confirmed that the pair don’t want to wait too long to marry. “They’re eager to walk down the aisle and become husband and wife,” shares the source. “It’s going to be the wedding of the century!”

Travis has been following Taylor around the globe during the football off-season and even joined her onstage for a vaudeville-style skit (he’s admitted it was his idea) during her June 23 London tour stop. According to the source, the athlete promised early on in the relationship that he’d always support her dreams and ambitions and never hold her back — and he’s more than proven himself in recent months.

They’ll invite family plus friends, like Paul McCartney, Stevie Nicks (“Taylor would love them to sing something,” adds the source), Ryan Reynolds, Ed Sheeran, Bradley Cooper, Gigi Hadid, Emma Stone, Sophie Turner and, of course, Taylor’s besties Blake Lively and Selena Gomez. “She’s torn on whom to choose as maid of honor,” notes the source. “Blake or Selena?” Taylor’s ex-boyfriend Taylor Lautner, with whom she’s remained pals, and his wife “will no doubt make the list, too,” says the insider.

He’s in luck, because billionaire Taylor and Travis — who this year became the NFL’s highest paid tight end, with an average annual salary of $17.1 million — “are intent on footing the bill for private flights and lodging for guests,” says the source. “Taylor’s waited a long time for this moment, so she has no problem going all out. They could end up spending as much as $3 million!”