Brenda Song Trace Cyrus Engaged, Miley Cyrus Excited as Sister in Law

Brenda Song

Miley Cyrus is gaining a sister-in-law!

That's right, they may not be confirming anything else, but they are confirming this: Trace Cyrus and Brenda Song are engaged!

The couple, who began dating in spring 2010 and who, at least at last check, are expecting their first child together, revealed the happy news on (where else?) Twitter this afternoon.