Posting a throwback shot of the This Kiss singer as a teenager, MCGraw, who celebrated his wife's 49th birthday on Monday (22Sep16), called her "extraordinary".

"Happy birthday to this crazy, talented, beautiful woman," the 49-year-old star wrote on Wednesday (21Sep16). "I am so lucky to be married to and be with her for the rest of my life. The best mother and role model that my 3 daughters could possibly have. She is extraordinary!!"

Hill also took to Instagram to thank fans for their birthday wishes, posting a shot of mile marker 17 on Highway 1 in Pebble Beach, California, calling it "a spiritual place that has always made me cry like a baby".

Tim and Faith also have a big anniversary coming up - they will have been married for 20 years on 6 October (16).