Robert Pattinson Engaged, Kristen Stewart Heartbroken? FKA Twigs Promise Ring Sparks Summer Wedding Buzz, Dating Too Serious?

Robert Pattinson and FKA Twigs have only been dating for less than a year - but is the "Twilight" heartthrob already preparing to pop the big question so soon?

The 28-year-old British heartthrob romanced Kristen Stewart for quite awhile, and marriage was never really an option. So things must be pretty serious with his new English muse!

Rumors suggest that R-Patz went ring shopping back in December. But he did NOT purchase any engagement bling. Instead, Pattinson surprised the "Two Weeks" songstress with a beautiful promise ring. The couple is definitely happy-in-love.

According to E! News, the "Cosmopolis" star recently revealed to a close group of pals that he's ready to tie the knot with Twigs - just not yet. Let her finish-up touring and he'll conclude a few film projects... then they'll get married!

Maybe even as early as this summer...

The relationship's moving fast, but the chemistry is simply undeniable:

"There is a special connection between the two of them," an alleged sourceexplains. "Music is a big part of the relationship, because it means to much to them. They clicked instantly and they literally have been inseparable."

Are Robsten fans disappointed?

Although such marriage talk remains unconfirmed, Twitter's still abuzz. Another sexy Hollywood bachelor off the market!

@_iamkieraa: "Robert Pattinson is already engaged okay there goes my Edward Cullen."

@zeeejayee: "I bet the next one to get engaged are Robert Pattinson and FKA Twigs hahaha."

@keiralawgosling: "fka twigs and robert pattinson are engaged!! AYAYAYAYYAYAY!!! hope its true :P."

@AmysValerie: "Robert Pattinson and FKA twigs yes I'm here for it!!!!"

@Triple_OG_Fresh: "YES! I'm all the way here for it! Think they're engaged!"

Well - stay tuned.

Meanwhile, Twigs recently experienced some tragic tour drama:

@FKAtwigs: "i am so sorry Brussels due to a fatal accident on the rails today i spent 7 hours on stand still only to be sent back to London."

@FKAtwigs: "i am so sad i can't perform for you tonight :( i was really excited to see you! i will come back to play for you as soon as possible <3."

Keep the positive vibes going!