'I love you with all my heart!' Catherine Zeta-Jones shares sweet 99th birthday message for father-in-law Kirk Douglas

She's grateful for having him in her life. 

And actress Catherine Zeta-Jones shared her love of her father-in-law Kirk Douglas in a sweet birthday message on Wednesday.

The Oscar-winning actor was celebrating his 99th birthday.

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Much appreciation: The stunning Welsh beauty posted a black and white image of the duo on Instagram, with Catherine kissing him softly on the cheek. 'Happy Birthday to my dearest Father in Law, Kirk. 99 years young today. I love you with all my heart,' she wrote

Much appreciation: The stunning Welsh beauty posted a black and white image of the duo on Instagram, with Catherine kissing him softly on the cheek. 'Happy Birthday to my dearest Father in Law, Kirk. 99 years young today. I love you with all my heart,' she wrote

Father and son love: Catherine's husband Michael, 71, took to Facebook and shared a short, yet sweet, message to his father. 'Happy 99th Birthday Dad. I love you,' he wrote.  This picture was taken of the duo in April 2003

Father and son love: Catherine's husband Michael, 71, took to Facebook and shared a short, yet sweet, message to his father. 'Happy 99th Birthday Dad. I love you,' he wrote.  This picture was taken of the duo in April 2003

The stunning Welsh beauty posted a black and white image of the duo on Instagram, with Catherine kissing him softly on the cheek.  

'Happy Birthday to my dearest Father in Law, Kirk. 99 years young today. I love you with all my heart,' she wrote. 

Catherine's husband Michael, 71,  took to Facebook and shared a short, yet sweet, message to his father. 

 'Happy 99th Birthday Dad. I love you."

Hot wife: Catherine Zeta-Jones, 46,  has been married to Kirk's son Michael since 2000. They celebrated their 15th wedding anniversary on November 18

Hot wife: Catherine Zeta-Jones, 46,  has been married to Kirk's son Michael since 2000. They celebrated their 15th wedding anniversary on November 18

Everlasting love: Catherine and Michael Douglas, 71, are exactly 25 years apart. The Chicago star was born in 1969 while Michael in 1944 

Everlasting love: Catherine and Michael Douglas, 71, are exactly 25 years apart. The Chicago star was born in 1969 while Michael in 1944 

The couple, having both been born on September 25, are exactly 25 years apart. Catherine was born in 1969 while Michael in 1944. 

On November 18, the duo celebrated their 15th wedding anniversary. 

While accepting an award at an AARP luncheon, the Ant-Man actor gave a special shutout to his wife, acknowledging their milestone wedding anniversary, according to People.  

'[I wanted] to thank you as we celebrate our 15th wedding anniversary: Thank you for the love and all your support. Thank you so much,' he gushed.

Happy times: Catherine honoured their 15 years together in a romantic Instagram post of the duo together. 'Happy Anniversary dearest Michael! Loving our life together, here's to the next 15! ' she wrote

Happy times: Catherine honoured their 15 years together in a romantic Instagram post of the duo together. 'Happy Anniversary dearest Michael! Loving our life together, here's to the next 15! ' she wrote

Loving family: The couple (pictured here on July 8) have two children between them; son Dylan, 15, and daughter Carys, 12. Michael has a son, Cameron, 36, from his previous marriage to Diandra Luker

Loving family: The couple (pictured here on July 8) have two children between them; son Dylan, 15, and daughter Carys, 12. Michael has a son, Cameron, 36, from his previous marriage to Diandra Luker

Catherine honoured their 15 years together in a romantic Instagram post of the duo together. 

'Happy Anniversary dearest Michael! Loving our life together, here's to the next 15! ' she wrote.

The couple have two children between them; son Dylan, 15, and daughter Carys, 12. Michael has a son, Cameron, 36, from his previous marriage to Diandra Luker.

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