Lucille Ball's daughter Lucie shares photo with brother Desi Arnaz Jr.

Lucille Ball and Desi Arnaz's children shared a new photo together over the weekend.

The iconic TV couple's daughter, Lucie Arnaz, took to Instagram on Saturday, Aug. 3, to share a couple snaps with her brother Desi Arnaz Jr. -- whom she called "my recalcitrant brother."

"Desi is alive and well, my friends - just likes to stay a bit 'undercover,'" she explained.

Arnaz noted that she was in Las Vegas for her husband Laurence Luckinbill, who was honored at a celebration event marking the 35th anniversary of "Star Trek V: The Final Frontier."

Luckinbill played Spock's half-brother Sybok in the 1989 film.

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Arnaz also recounted meeting up with pals while she was in Las Vegas, writing, "What smart, interesting, funny, involved and talented and lovable friends and family have I."

The actress -- who is the eldest child of the "I Love Lucy" couple -- added hashtags for "grateful" and "family fun" to her post.