"The worst has already passed! Thank you all for your sweet messages we really appreciate them! #thankyou."

TMZ reported Richard was suffering with a cough before his holiday with Alejandra, but it got so bad on the trip that he was forced to seek medical help.

The pair tied the knot in a secret civil ceremony in 2018, after almost three years of dating, and have two children together, who were with them on the break.

Alejandra also revealed on Instagram the whole family had been sick, but did not specify their illnesses.

She said: "Thank you all for the birthday wishes.. after almost 3 weeks of everyone being sick in our family today finally I feel much better! Thank you for all the love. I give it all back to you!"

Richard, who was previously married to supermodel Cindy Crawford, 56, and actress Carey Lowell, 62, has two boys with Alejandra as well as 22-year-old son who he had with Carey, while Alejandra has son Albert, nine, from a previous marriage.

The actor said about settling down for the third time: "I have found the quiet and happy life that I have always sought."

Alejandra has said about their relationship: "I was a little lost, without light, and knowing him gave meaning to my life. It was feeling that someone was reaching out and showing me my true path."