Lucie Arnaz said her brother "just likes to stay a bit 'undercover'" in an Instagram post on Saturday, Aug. 3. Lucille Ball's son Desi Arnaz Jr. is making a rare appearance on social media.

Desi Arnaz Jr., the son of I Love Lucy stars Lucille Ball ... Desi and Lucille's daughter Lucie posted a carousel of photos ...

Lucie, who appears in the new documentary Lucy and Desi, says Arnaz got sober with the help of her younger brother Desi Jr. "He resisted going into AA or any program for a long, long time.

According to the actress, Lucie Arnaz — the daughter of Ball and her I Love Lucy co-star/real-life husband Desi Arnaz — was on set that day and “cried” when she saw Messing dressed as her ...

But as Lucie Arnaz explains in an interview for "Lucy and Desi," as the company grew bigger, her parents grew apart. Desi Arnaz began working too much, drinking too much, and getting caught with ...

Hinsche died on Saturday, Nov. 20, of giant cell carcinoma — the same day his 95-year-old mother Celia died in hospice, according to childhood friend Lucie ... Arnaz's brother Desi Arnaz Jr ...