Mum-of-two Catherine, who shares son Dylan, 20, and daughter Carys, 17, with her husband, also marked the special occasion online.
“Its our birthday today,” she informed her followers alongside a cosy snap of the pair on holiday.
She also posted a throwback snap from 1974, which showed the now 51-year-old as an adorable youngster.
“My Mam and I on my birthday in 1974. Spain,” she captioned the old family photograph.
Instagram followers and fans rushed the comments section of both posts to send them birthday wishes.