Two of Hollywood's most endeared children posed for a rare photo op! Over the weekend, Lucille Ball and Desi Arnaz's children, Lucie Arnaz and Desi Arnaz Jr., had a brother-sister outing and Lucie used the moment to give an update on her brother. "Thank you, Nick Luckinbill, (mega producer for EDC) for treating your family to a grand meal at Wally’s in Las Vegas, with our special guest, my recalcitrant brother, Desi Arnaz, Jr.

!!! Desi is alive and well, my friends- just likes to stay a bit 'undercover,'" Lucie wrote next to the photo carousel that led with a series of sweet selfies of her and her brother posing cheek to cheek for the camera. "We are here for the weekend as Larry is being tributed during the 35th Anniversary of Star Trek V celebration at The Treksperts Convention here. He played Spock’s brother, Sybok in that film- and with his autobiography just released, is a very special guest here.

He’ll be taking photos, selling and signing books and speaking on two panels. Then I snuck away to Caesar’s and Joe’s Seafood to join the indomitable Sunny Sessa, her dear Max and our pals, Clint and Kelly Holmes for more stimulating conversation and just a few naughty sweets!! What smart, interesting, funny, involved and talented and lovable friends and family have I." Lucie, 73, and Desi Jr.

, 71, rarely have photo moments together. However, Lucie is active on her Instagram account, often sharing pictures of her late parents, and clips from her concerts. Desi Jr.

on t.