Miley Cyrus & Zac Efron's Halloween with the Michalkas

Posted Tuesday November 1, 2011 2:39 AM GMT

Mingling with their closest friends while celebrating the Halloween holiday, Aly and AJ Michalka treated fans to some party insider pics from the weekend festivities.

The "78violet" singers took to Twitter to share the fun-filled photos, as the ladies posed in one shot alongside fellow former Disney star Miley Cyrus - who was looking ever so ghoulish for the west coast costume party.

Also roaming the grounds before being grabbed up for a Michalka sandwich shot was "High School Musical" hunk Zac Efron, who donned a Reno 911 police outfit.

Tweeting “Love our friends xo" with the photos, Aly and AJ rounded out their Halloween star shot pic releases with a too cute pic of themselves alongside the lovely Emma Roberts, who opted to dress up as a Playboy Bunny for her Halloween doings.

Photo Credit: Twitter