Zuckerberg has been working on his physique amid his rumored UFC match with Elon Musk.
The actor took to Instagram to share a message for his sister on Tuesday.
Last month, ET reported that Bella was in daily treatment for Lyme disease.
The 'Jersey Shore: Family Vacation' spoke about her body image to ET after getting candid about her struggles with weight and food.
The singer was hospitalized for a week due to blood clots.
The performances come after Davidson entered a rehab facility for mental health treatment last month.
The report comes amid Bynes' struggles with her mental health and treatment over the last year.
The singer spoke out for the first time on Thursday, days after she was treated for blood clots.
The 'Three's Company' star has battled cancer multiple times over the years.
The actor suffered a near-fatal snowplow accident on New Year's Day.
The singer was hospitalized earlier this month with a bacterial infection.
Kelly was hospitalized last week and treated for blood clots.
The actress' 2-year-old son has been diagnosed with Gianotti-Crosti syndrome.
The NBA star also posted pics with his son, Bryce.
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