Brenda Song and Trace Cyrus

Brenda Song, best known for playing privileged yet neglected rich girl London Tipton in The Suite Life of Zack & Cody, is pregnant, Celebuzz reports. She's expecting her first child with Miley Cyrus' older brother Trace Cyrus.

Song, 23, and Cyrus made their first public appearance together in May at the Nylon party but they've reportedly been seeing each other for months.

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Besides The Suite Life and its spin-off, Suite Life on Deck, Song has also appeared on Disney's Hannah Montana (starring her boyfriend's famous sis), The Wizards of Waverly Place and the TV movie Wendy Wu: Homecoming Warrior. On the big screen, she recently played the clingy, fire-loving girlfriend to Eduardo (Andrew Garfield) in The Social Network.

Cyrus, 22, is the adopted son of Billy Ray Cyrus and once played in the band Metro Station before it broke up. The site for his clothing company, Southern Made Hollywood Paid, features Song as a model.

Neither Song nor Cyrus' reps could be reached for comment.