Colton Haynes celebrates New Year’s Eve at Marquee at The Star on Monday night (December 31) in Sydney, Australia.

The 24-year-old actor was joined at the bash by his Teen Wolf co-stars Tyler Hoechlin and Sinqua Walls!

The guys also rang in the New Year with Desperate Housewives actor Shawn Pyfrom, as well as Switched at Birth star Lucas Grabeel.

In case you missed the good news, Colton has joined the cast of Arrow as the handsome and street-saavy Roy Harper.

ARE YOU EXCITED to see Colton on Arrow?

Colton Haynes and his mom stop by to say hi to Santa Claus in this cute pic from Instagram.

The 24-year-old actor spent the holidays with his family in Kansas and even stopped by to visit his grandmother in the hospital.

“Christmas with Grandma :) she’s cracking me up,” Colton tweeted.

PHOTOS: Check out the latest pics of Colton Haynes

Colton just recently booked a role on the CW’s Arrow.

“Read the script for my first Ep. of #Arrow …y’all r in for quite the ride. @colindonnell and I actually met a few months back,” he wrote, adding, “Also excited for a #thegates reunion with the incredible @janina on #Arrow …good times ahead!”

Can’t wait to see him on the show!

Colton Haynes walks along with two of his favorite ladies — actresses Holland Roden and Ally Maki — while out at the Grove in Los Angeles on Saturday afternoon (December 15).

The trio browsed around the shops before heading on their way.

“Last night’s dinner adventure/the start of @heartsmaki ‘s early surprise bday wknd. more to come! #KeektoColton http://www.keek.com/!8dpKaab” Colton tweeted.

Ally added, “I don’t have words for tonight. Feel so absolutely grateful and undeserving of all the love tonight.”

Earlier in the week, Colton and Ally were spotted at The Grove picking up a few last minute holiday gifts.

Colton Haynes smiles towards the cameras as he leaves The Grove in Los Angeles on Tuesday afternoon (December 11).

The 24-year-old actor picked up a few holiday gifts from the Apple Store with best friend Ally Maki.

PHOTOS: Check out the latest pics of Colton Haynes

In case you missed the news, Colton just joined The CW’s Arrow!

He’ll play Roy Harper, “a handsome, street-savvy, teenager from ‘the Glades,’ the harsh, poverty-stricken portion of Starling City” who also serves as a love interest for Thea (Willa Holland).

Colton Haynes has signed up for the superhero game, TVGuide reports.

The 24-year-old former Teen Wolf star has joined the CW’s Arrow as Roy Harper.

In the DC Comics universe, Roy was the Green Arrow’s sidekick Speedy, Teen Titans member Arsenal, and the Justice League’s drug-addicted, one-armed Red Arrow.

In the hit CW show, Roy is described as “a handsome, street-savvy, teenager from ‘the Glades,’ the harsh, poverty-stricken portion of Starling City.”

Colton‘s character will also be a love interest for Willa Holland‘s Thea.

WHAT DO YOU THINK about Colton joining Arrow – YAY or NAY?

Colton Haynes joins gal pal Lucy Hale at the Nylon Holiday Celebration held at the Andaz Hotel in Los Angeles on Friday night (December 7).

The event also celebrated the December/January cover of the mag featuring Lucy on the cover.

“Huge Congrats to @lucyhale on her Nylon Cover. Was a fun night at the Dinner,” Colton tweeted.

Just a few nights before, Colton was spotted out with Holland Roden at the Childrens Defense Fund Beat The Odds event.

10+ pics inside of Colton Haynes… More Here! »

Holland Roden and Colton Haynes step out at the Children’s Defense Fund of California 2012 Beat The Odds Awards held at Beverly Hills Hotel on Thursday night (December 6) in Beverly Hills, Calif.

The Teen Wolf actress wore a lovely Charlotte Ronson Spring 2013 dress with an Edie Parker clutch, Jerome C. Rousseau heels, and Tacori earrings.

PHOTOS: Check out the latest pics of Colton Haynes

The Beat the Odds Scholarship and Leadership Program recognizes outstanding high school students who have overcome adversity to excel in school and as leaders in their respective communities.

15+ pics inside of Colton and Holland… More Here! »