Rob Kardashian is keeping up with family milestones.

The 39-year-old joined the rest of his family as they celebrated Khloe Kardashian’s 42nd birthday, marking a rare occasion in which the youngest of Kris Jenner and Robert Kardashian’s four kids has appeared on social media since stepping away from the spotlight. 

In the carousel of images Khloe shared from her elegant bash, Rob wore blue and white athletic shorts, a black tee, matching sneakers and a baseball cap as he smiles alongside his family. 

Joining him for a couple duo shots was his 9-year-old daughter Dream Kardashian, whom Rob shares with ex Black Chyna. In one, Rob holds two peace signs up behind his daughter while Dream hugs him in the second.

Featured in the carousel were sisters Kourtney Kardashian and Kim Kardashian, mom Kris, Khloe’s kids Tatum and True, their dad Tatum Thompson as well as Khloe’s BFFs Malika and Khadija Haqq, among other pals.

The Good American co-founder captioned the June 30 carousel, referencing family that weren’t present such as sisters Kylie Jenner and Kendall Jenner, “How blessed am I? Missing a few but they’re always with me.”

Rob, for his part, wrote in the comment section, “We are so Blessed to have you! We love you so much!!!”

Khloe’s party was decorated with an abundance of pink balloons in every shade, pink and white flowers as well as at least three pink birthday cakes. The theme was, as she described in a second Instagram post, “Champagne, Cavalli and Caviar.”

“Still floating from all the birthday love,” Khloe—who wore a paneled, figure-hugging orange gown for her special day—captioned her June 29 post. “Thank you for making my day feel so special. My heart is full, and I feel incredibly blessed.”

As for Rob, his appearances on public and online are kept to a minimum.

Other than sharing a Story in May supporting his niece North West’s album, the only Kardashian’s last post was for Dream’s 9th birthday in November.

“Thank you for making me proud every day,” he captioned his post at the time, which featured Dream smiling in front of a cake, “I love you so much!!”

As he put it, “I am Happy when you are Happy. Happy Birthday.”

For a closer look at Rob’s time in (and out of) the spotlight over the years, read on. 

Kris Jenner welcomed her only son and youngest child with Robert George Kardashian, named Robert Arthur Kardashian, on St. Patrick's Day in 1987.

Robert and Rob couldn't look more alike in this throwback snap.

A bleach-blonde Rob smiles from ear-to-ear for a photo with sister Kylie Jenner.

As you can see from this vintage pic, Rob and sister Khloe Kardashian have always been close.

Rob joins mom Kris, sisters Kim and Khloe on the red carpet at the Kardashian Charity Knock Out at the Commerce Casino in November 2009.

For Kim's birthday in 2010, she and her siblings Rob, Khloe and Kourtney Kardashian hit up the TAO Nightclub in Las Vegas.

Khloe supports brother Rob at the 2011 BBVA NBA All-Star Celebrity Game in Los Angeles, Calif.

The Keeping Up With the Kardashians alum plants a kiss on then-girlfriend Rita Ora.

Rob receives a sweet touch from Rita in this black-and-white photo.

Rob beams with pride in this solo shot from his Arthur George launch at Neiman Marcus.

Rob and sister Kim hit the red carpet at the World's Most Beautiful magazine launch event at Drai's Hollywood in August 2011.

The Keeping Up With the Kardashians siblings attend the E! 2012 Upfront in New York City.

Rob rings in his 26th birthday at the 1 OAK Nightclub at the Mirage in March 2013.

Rob enjoys a pulled pork sandwich in Malibu in this #tbt from 2015.

Khloe and Rob catch some Zzzs in this Instagram photo.

After three months of dating, Rob and Blac Chyna announce their engagement on April 5, 2016.

Following their engagement, Rob and Chyna step out for his birthday at the Hard Rock Cafe in Hollywood on May 10, 2016.

In May 2016, Rob and Chyna announce they're expecting a baby together. The twosome reveal they are having a little girl in September 2016.

Rob and Chyna welcome daughter Dream Kardashian on November 10, 2016.

The father of one watches over his little one as he helps her float in the pool.

Dream looks comfortable in the water in this snap with her father.

Rob's mom Kris, known as Lovey to her grandchildren, spends quality time with baby Dream.

Dream's parents give her a magical day at Disney, including a moment with Minnie Mouse! Rob and Chyna break up in 2017.

Dream can't stop giggling as dad Rob lifts her in the air.

The super private star proudly holds up his only child.

Dressed as a character from Trolls, Rob poses for a Halloween photo with mom Kris in 2019.