Lucille Ball and Desi Arnaz's Daughter Delights With Rare Photo With 'Undercover' Brother

Lucille Ball and Desi Arnaz's two children, Lucie and Desi Jr., made a rare appearance on social media together, posing for a couple of sweet photos in Las Vegas, Nevada.

The more public of the two siblings, Lucie, took to her Instagram for the special post, thanking a friend for a meal together with a few others. She called Desi Jr. "our special guest, my recalcitrant brother."

"Desi is alive and well, my friends- just likes to stay a bit 'undercover'," she added. In the photos together, Lucie wore a two-tone shirt with dangling earrings as she smiled and leaned her head on her brother's shoulder.

Meanwhile, Desi Jr. had a relaxed look, wearing a black Nike zip-up jacket and an Air Force One hat. He also had a bright white and gray beard.

Fans appreciated seeing the sweet family moment, with people writing in the comments, "I love the love they have for each other! ??," and "Great to see both of you together ????."

"So great to see Desi Jr.!! ???? Gosh he still looks so much like your Dad ?? Thanks for sharing these pics Lucie! ??," replied another, while someone else said, "I would have never guessed that was your brother! Desi! You are such a handsome guy! Let it shine! ??."

More complimented Lucie, saying she looked "amazing," "gorgeous as always" and "lovelier than ever ??."

Lucie was born in the summer of 1951, while Desi Jr. was born in early 1953. Their parents, Ball and Arnaz, are legends in the world of television and comedy, most well known for their show I Love Lucy. The couple also had The Lucy-Desi Comedy Hour, while Ball also starred in the long-running shows The Lucy Show and Here's Lucy, among other projects.

Arnaz passed away in 1986 at the age of 69, while Ball died in 1989 at the age of 77.

Next: Celebrate Lucille Ball's Birthday by Reliving These 7 I Love Lucy Scenes That Still Make Us Laugh