Lucie Arnaz Luckinbill recently gave fans a rare ... Lucie mentioned in the caption that she was there to support her husband ...

In the caption, Lucie — who is the child of the late I Love Lucy stars Ball and Desi Arnaz, as is her brother — thanked her husband Laurence ... for the weekend as Larry is being tributed ...

CBS Photo Archive/Getty; Lucie Arnaz Luckinbill/Instagram Lucille Ball and Desi Arnaz’s daughter celebrated her younger brother’s birthday this week with a heartwarming message on Instagram ...

Lucille Ball and Desi Arnaz's kids ... making Lucie a stepmom to Laurence’s two children from his previous marriage to Robin Strasser, Nick and Ben Luckinbill. They welcomed their first ...

Lucille Ball and Desi Arnaz; Lucie Arnaz and Desi Arnaz Jr. as children in the 1950s ...

“Happy birthday to my soulmate and best buddy. My beautiful baby brother, Desiderio Alberto Arnaz IV,” Lucie Arnaz, 73, wrote in the Monday, Jan. 20, post. “He is one of a kind. Brilliant thinke ...