From touching, love-filled messages to funny, witty ones ... And don't forget to check out our birthday wishes for sisters, brothers, best friends, sons and daughters.
Prince William extended birthday wishes to his brother Harry on his 40th birthday despite their strained relationship. The brothers, who were once close, have not communicated for two years.
Because we feel it is our sacred duty to make your life a little easier, we've compiled a list of funny, sweet, and even sentimental birthday wishes suitable for any colleague relationship.
While the Duke of Sussex spent the day with friends and family in Montecito, across the pond, his dad, King Charles, and his brother, Prince William, publicly sent him birthday wishes.