Cory Monteith is grateful for the unwavering support of his fans.

The 'Glee' star - who left rehab this week after checking in to a treatment facility for substance addiction for a month - returned to Twitter on Friday (26.04.13) to thank his fans for being there for him and admitted it has meant a lot to him.

The 30-year-old actor wrote: ''Sending out big love to everyone. Thank you for the continued support! It means the world to me!''

His co-star and girlfriend Lea Michele, 26, similarly expressed her gratitude for her fans' well wishes and tweeted shortly afterward: ''Today is a great day. Love you all! Xo.''

The couple jetted off on holiday as soon as Cory completed his treatment.

A witness who spotted them at Los Angeles International Airport previously said: ''Both Lea and Cory seemed very happy, smiling the entire time.

''When security asked Cory how he was doing, he said good. They were friendly to those around them and appeared in great moods and excited to get out of town.''

Cory - who had been clean since going to rehab at the age of 19 - was reportedly led astray by his Hollywood friends and started drinking and taking drugs at parties at his Hollywood Hills home.

An insider said: ''He drinks hard and then he can't say no to other things. The house party scene in Los Angeles is dangerous for him. He thought he could dive in and then drop it but he got hooked on stuff again.

''Rehab can work for him because he's committed. He feels blessed with his life. He saw that he needed outside help and he really wants to get back on track.''