Lea Michele and Cory Monteith in January at SAG Awards
04/26/2013 at 06:00 PM EDT
is finished with rehab and back with Lea Michele
– and pair were spotted Friday at Los Angeles International Airport.
A source confirms to PEOPLE that Monteith, 30, completed treatment for substance abuse
after about a month.
: "sending out big love to everyone. thank you for the continued support! It means the world to me! :)"
Michele added on Twitter
: "Today is a great day:) Love you all! Xo."
Michele, 26, was accompanying her Glee
costar/beau for the trip. The actor sported a new short haircut.
The pair seemed "very happy, smiling the entire time," an eyewitness tells E! News
, which posted photos of them, adding that when security asked the actor how he was doing, he said, "Good."
Following his admittance to treatment, a Monteith source told PEOPLE
at the time, "Lea is an excellent influence on him. She's good for him. She's really calmed him."
Reporting by JULIE JORDAN