John Stamos has entered rehab.

John Stamos Is 'Heartbroken' Olsen Twins Not Returning For 'Full House' Revival

After being arrested for DUI last month, the 51-year-old Full House actor has checked into residential program, which treats patients suffering from substance abuse.

"John Stamos has been in rehab for more than 2 weeks now," TMZ reported on Saturday. "Stamos checked into a residential treatment facility on June 24, according to our sources. That was 12 days after his DUI bust in Beverly Hills."

Fans Don't Recognize John Stamos At The 'Full House' House--Take A Look As They Walk Right Past Him

According to TMZ, Stamos' alleged issues with substance abuse are nothing new. Their source claims the longtime actor's addiction struggles have "developed over a period of time."

PEOPLE Magazine was first to report news of Stamos' rehab stint.

Earlier this year, Stamos, along with several other cast members from Full House signed on to appear in a Netflix reboot of the 90s series. Sadly, the Olsen twins will not be a part of it.

"Although Ashley and Mary-Kate will not be a part of Fuller House, I know how much Full House has meant to them and they are still very much considered family," Executive Producer Robert L. Boyett said in a statement. "It has been exciting to see how they have built their professional careers, and I support their choice to focus on their fashion brands and various business endeavors. I appreciate their support and good wishes towards Fuller House."

Stamos is due in court this September to address his DUI charge.

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