Setback for Zac? Efron's Friends Fear For His Sobriety After He Goes MIA – Why They're Worried
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Sept. 17 2015, Published 6:58 a.m. ET
Over the past year, Zac Efron has worked very hard to maintain his sobriety and rebuild his career. However, a source within the 27-year-old's sober circle tells RadarOnline.com exclusively that, after a series of recent mishaps that included a box office flop and a possibly permanent split from his girlfriend of one year, the High School Musical hunk has gone MIA -- and his friends fear the worst! Click through these photos of Efron to learn why those close to him are so concerned.
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INF – We Are your Friends Los Angeles Premiere
![Zac Efron Relapse](https://media.radaronline.com/brand-img/OYauEzcQb/333x500/2015/09/Zac-Efron-Relapse-005.jpg 333w)
On August 28, Efron took his girlfriend Sami Miro to the L.A. premiere of his movie We Are Your Friends. But the usually bright-eyed star looked a little foggy.
‘We Are Your Friends’ Tour Stop Photo Call And After Party
![Zac Efron Relapse](https://media.radaronline.com/brand-img/ubpJ7PkBa/318x500/2015/09/Zac-Efron-Relapse-004.jpg 318w)
After the drug- and party-themed flick completely bombed at the box office, a source on the set of Efron's newest film Neighbors 2 told RadarOnline.com, "Zac showed up to a cast party in Atlanta and he looked like he was totally out of it. He was complaining to anyone who would listen that he had to make a movie about a drug-fueled music scene – without being able to use drugs."
INF – We Are your Friends Los Angeles Premiere
![Zac Efron Relapse](https://media.radaronline.com/brand-img/ClL4-sWRP/333x500/2015/09/Zac-Efron-Relapse-006.jpg 333w)
After the L.A. premiere, where this blurry-eyed photo was taken, Efron forgot his one year anniversary with his girlfriend Sami Miro. Although he later posted a belated message on his Instagram to say "Happy Anniversary Baby," the source says, "Zac and Sami got into a serious fight after he didn't do anything really romantic or special for her." Since then, Efron has gone completely silent on both his Instagram and Twitter.
Exclusive… First Look: Chloe Moretz Debuts Her ‘Crazy’ New Role As She Joins Zac Efron To Prep For “Neighbors 2″ – NO INTERNET USE WITHOUT PRIOR AGREEMENT
![Zac Efron Relapse](https://media.radaronline.com/brand-img/as59CZ4Bc/381x500/2015/09/Zac-Efron-Relapse-007.jpg 381w)
"Zac keeps a pretty tight circle and his friends are legitimately worried about him because of everything that he has been going through," the source tells RadarOnline.com.
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![Zac Efron Relapse](https://media.radaronline.com/brand-img/9t-OcLclm/392x500/2015/09/Zac-Efron-Relapse-008.jpg 392w)
Aside from the fact that he forgot his anniversary and had to deal with his movie flopping, the source tells RadarOnline.com that "Zac has been starting to hang out with some of his bad influence friends again."
INF – Zac Efron & Dave Franco On Set Of ‘Neighbors 2: Sorority Rising’
![Zac Efron Relapse](https://media.radaronline.com/brand-img/NUZISemTY/419x500/2015/09/Zac-Efron-Relapse-009.jpg 419w)
According to the friend, "Zac's friends have been texting and calling and he isn't being responsive. When he has responded it is always just a one word answer, followed by nothing."
INF – Zac Efron at ‘Good Morning America’
![Zac Efron Relapse](https://media.radaronline.com/brand-img/gfYlVEKdk/292x500/2015/09/Zac-Efron-Relapse-003.jpg 292w)
As RadarOnline.com previously reported, in 2013 Efron entered a treatment facility to overcome addiction issues.
Celebrities arrive at the MTV Movie Awards
![Zac Efron Relapse](https://media.radaronline.com/brand-img/WPnnhrDfX/345x500/2015/09/Zac-Efron-Relapse-002.jpg 345w)
Following his stint in rehab, Efron was sober until the summer of 2014, when he revealed that he had relapsed by being photographed drinking at a bar in Ibiza with girlfriend at the time, Michelle Rodriguez.
Zac Efron supports the Lakers at Game 7 at the Staples Center in Los Angeles
![Zac Efron Relapse](https://media.radaronline.com/brand-img/iQ431hfeR/327x500/2015/09/Zac-Efron-Relapse-001.jpg 327w)
But over the course of the past year, Efron has gone to great lengths to prove to his friends and family that he can stay clean and lead a sober and healthy life.