Amber Rose and Wiz Khalifa Throw Joint Birthday Bash for Son Sebastian -- See the Pics!

Happy birthday, Sebastian!

While Amber Rose says she and Wiz Khalifa aren't back together, the two reunited after their steamy red carpet kiss last weekend for their son Sebastian's birthday on Sunday.

WATCH: Amber Rose Kisses Ex Wiz Khalifa, Rocks Giant Diamond Ring Pre-GRAMMYs Event

The pair went all out for Sebastian's 4th birthday, even rocking elaborate costumes for the tot's super-hero themed soiree.

Sebastian's costume is by @calicr8! #sebastiantaylorthomaz Happy Birthday Pumpkin 🎃

A post shared by Amber Rose (@amberrose) on Feb 20, 2017 at 11:35am PST

S E B A S T I A N B I R T H D A Y 🉐 02 www.iamKevinWong.com Photo 📸 By | @iamKevinWong

A post shared by Kevin Wong Photography (@iamkevinwong) on Feb 20, 2017 at 9:31am PST

A post shared by Wiz Khalifa (@wizkhalifa) on Feb 20, 2017 at 8:58am PST

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Sebastian had his face painted like the Joker and wore a Catboy costume. The little cutie even got into character as he wrestled with Blac Chyna's son, King Cairo, with Rob Kardashian's fiancee goofing off in the background.

Cha cha slide #sebastiantaylorthomaz Happy Birthday 📸 by @iamkevinwong ❤️🙏🏽

A post shared by Amber Rose (@amberrose) on Feb 20, 2017 at 11:44am PST

Lol boys will be boys! Happy birthday Pumpkin! #sebastiantaylorthomaz 📸 by @iamkevinwong

A post shared by Amber Rose (@amberrose) on Feb 20, 2017 at 11:47am PST

Lol Birdman hands #sebastiantaylorthomaz 😂 photo by @iamkevinwong

A post shared by Amber Rose (@amberrose) on Feb 20, 2017 at 11:52am PST

A post shared by Wiz Khalifa (@wizkhalifa) on Feb 20, 2017 at 8:57am PST

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Chyna wasn't the only famous face (or extended member of the Kardashian family) at the superhero fete. Khloe Kardashian's ex, Lamar Odom, also made an appearance, posing for a photo with Khalifa.

Hangin with my dude @wizkhalifa at Sebastian's birthday party. #wutdadeal

A post shared by Lamar Odom (@lamarodom) on Feb 19, 2017 at 3:44pm PST

WATCH: Val Chmerkovskiy Addresses Amber Rose Split for the First Time: 'I'll Always Have Her Back'

Rose and Khalifa clearly have no problem coming together for their son, despite Rose's recent insistence that she's single.

"Wiz and I are family and we will be family for the rest of our lives," Rose wrote in a now-deleted Instagram post last week. "A kiss on the lips for a photo and a fun night out is not a big deal for either of us, we are in a great place but we are very much still divorced and not together."

The model and TV personality recently ended a five-month relationship with Dancing With the Stars pro Val Chmerkovskiy.

See more in the video below.

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