Either way, it's super important to show the person you love turning 40 — whether that be your mom, dad, brother ... we've compiled the best 40th birthday wishes to share.

Britain’s Prince William wished his estranged younger brother Harry a happy birthday ... “Wishing a Happy 40th Birthday to The Duke of Sussex!” read a post on William and wife Catherine ...

"Happy 40th brother. From the polo fields to all the ... The messages were unexpected, as public birthday wishes are usually reserved for working royals, though are sometimes made for milestone ...

Britain's Prince William wished his estranged younger brother Harry a happy birthday ... they have not spoken to each other in two years. "Wishing a Happy 40th Birthday to The Duke of Sussex!", read a ...

Prince William has wished his brother Harry a happy 40th birthday despite long-standing rumours of a rift between the pair. The Kensington Royal account retweeted an earlier happy birthday post ...