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While Trace Cyrus and Brenda Song still haven't said whether the Disney star is actually pregnant, they did confirm one rumor today: They're engaged!

Rumors started earlier this morning after Brenda was seen wearing a giant diamond ring on her finger yesterday in L.A.

Trace confirmed the news moments ago on his Twitter, saying "I am very excited to say, last week I asked my girlfriend Brenda Song to marry me and she said YES! We are both very excited to be engaged!"

Following Trace's announcement, sister Miley tweeted "can't wait for Brenda to be a Cyrus :) couldn't be more excited about my "sister in law to be" yay :)"

So ... could it be a shotgun wedding? Calls to both of their reps about her reported pregnancy haven't been returned.

The two made their first public appearance as a couple together back in May.

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