Lou Williams’ new teammates put on some unfamiliar faces to celebrate his 29th birthday on Monday night.

Just five days before Halloween, Williams, whose actual date of birth falls on Tuesday, had his teammates come in costume, while the man of the hour donned a Guy Fawkes mask a la “V For Vendetta.”

Headed to my bday party!!! A photo posted by Lou Williams (@louwillville) on Oct 26, 2015 at 9:39pm PDT

Meanwhile, his fellow Lakers dressed for the occasion, like Jordan Clarkson — who came as Billy the puppet from “Saw” — and Anthony Brown, who put on the Joker’s bank-robbery mask from the opening scene of “The Dark Knight.” Tarik Black also attended in a less obvious costume.

A photo posted by Anthony Brown (@antbrown_3) on Oct 26, 2015 at 11:45pm PDT

We learned why D’Angelo Russell's let his hair grow out, as he rode the “Straight Outta Compton” wave by coming as Eazy-E of the rap group N.W.A.

E-Z A photo posted by D'Angelo Russell (@dloading) on Oct 26, 2015 at 10:39pm PDT

Nick Young’s costume might have set the Instagram comments record for most laughing-so-hard-I’m-crying emojis.

Halloween party #godgift A photo posted by Nick Young (@swaggyp1) on Oct 27, 2015 at 12:22am PDT

But Williams’ teammates weren’t the only ones happy to celebrate his day. His two daughters decided to get a jump on the festivities with an early birthday cake.