Brenda Song and Trace Cyrus are engaged.

Nearly two months after announcing that they were expecting their first child, the couple is planning to head to the altar.

Cyrus, brother of Miley, confirmed the engagement via Twitter.

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! the 22-year-old wrote on Friday afternoon.

The older Cyrus and Song, 23, have been dating for one and a half years.

Song is perhaps most famous for her Disney roles on shows like The Suite Life of Zack & Cody and Phil of the Future. In 2010, Song had a small role in David Fincher's The Social Network, alongside Jesse Eisenberg, Andrew Garfield and Justin Timberlake.

Cyrus is the owner of the California-based clothing line, Southern Made Hollywood Paid, which Song has modeled for.

Since Cyrus' announcement, Twitter has been flooded with reaction from fans and critics alike.

Wait . . . Brenda Song is getting married Wow . . goodbye childhood, wrote one fan.

Brenda Song and Trace Cyrus are engaged? - No comment, wrote another.

Scroll down for photos of the newly engaged couple.