Meghan Markle is said to be preparing for a "meltdown of royal proportions" if she doesn't make the guest list for Taylor Swift' s upcoming wedding to NFL star Travis Kelce , sources tell RadarOnline.com .

Despite publicly congratulating the newly engaged couple – and even liking Swift's Instagram announcement – insiders say the Duchess of Sussex is privately seething that the global superstar's engagement has "eclipsed" her latest business and media ventures.

Swift, 35, revealed online in August that Kelce, 36, had proposed in a garden overflowing with pink and white flowers , posting a set of romantic photos captioned, "Your English teacher and your gym teacher are getting married." Article continues below advertisement

Swift’s Engagement Steals Markle’s Spotlight Tap He

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