05:11 AM EDT 03/19/2015
Originally posted 02/08/2013 06:45PM
Just when Chloe Moretz's 16th birthday bash seemed like it couldn't get any sweeter, the starlet received an extra special surprise.
Julianne Moore unexpectedly arrived with her son, Caleb, to help honor her on-screen daughter in the upcoming Carrie remake, a source tells PEOPLE.
Nearly 200 guests – including Moretz's four brothers and mom, and Sarah Hyland and Victoria Justice – were in attendance at the Teen Vogue-sponsored soiree held at the Aéropostale Times Square in N.Y.C.
Top 5 Most Voted Stories
Amber Roof, Sister of Alleged Charleston Gunman Dylann Roof, Creates GoFundMe Page to Pay for 'Dream Honeymoon' After Massacre Forced Her to Cancel Wedding
Ben Affleck and Jennifer Garner: How Their Differences Drove Them Apart
Scott Disick Cozies up to Another Woman in France While Kourtney Kardashian Minds the Kids Back Home
Ben Affleck's Mad Men Mentality Caused Problems in Marriage: Source
Ben Affleck and Jennifer Garner on Family Vacation After Announcing Divorce
Top 10 News Categories
The most buzzed about stars this minute!
Treat Yourself! 4 Preview Issues
More On PEOPLE.com
Got a News Tip?
Send it to our People.com editors!