RJ Mitte — My Mom’s a Vegas PARTY Machine!!!

091613_rj_mitte_launchBreaking Bad” star RJ Mitte isn”t the least bit embarrassed that he celebrated his 21st bday in Vegas with his mom … telling our sources, “WE PARTIED HARD!!!!”

We broke the story … Mitte — who plays Walter White Jr. on the AMC show — raged in Vegas with a bunch of hot chicks for his bday last month … with his mom by his side.

But outside Cecconi”s in West Hollywood this weekend, Mitte told us his mother”s not just a huge party animal — she also makes a SOLID wingman.

No one looks out for you like mom.