United Kingdom, March 20 -- Demi Moore shared a heartfelt tribute to ex-husband Bruce Willis on his 70th birthday.

The 'Die Hard' actor - who was previously diagnosed with Frontotemporal dementia (FTD), a degenerative disease, which causes behavioural changes and communication difficulties - celebrated the milestone age on Wednesday (19.03.25), and his former spouse marked the occasion with a series of photos of Bruce, their daughters Rumer, 36, Scout, 33, and 31-year-old Tallulah, and their eldest child's little girl Louetta, 23 months.

Demi - who divorced Bruce in 2000 after 13 years of marriage - captioned her Instagram post: "Happy birthday, BW! We love you [heart emoji] (sic)"

Meanwhile, the 'Pulp Fiction' star's wife Emma Heming ...