The 27-year-old actor was joined by Rupert Grint (Ron Weasley), Bonnie Wright (Ginny Weasley), and James Phelps (Fred Weasley), reported Us magazine.
The longtime friends hung out at State Social House on the Sunset Strip.
They appeared to nosh on appetizers and drink Corona Light while catching up.
Felton and Grint have stayed especially close since end of the saga's franchise in 2011.
In July 2011, Grint showed up to Felton's 'Rise of the Planet of the Apes' LA premiere wearing an 'I Love Tom Felton' T-shirt.