Beattie is the son of former Scotland number 8 John Beattie and brother of Scotland women's footballer Jenny Beattie.
Johnnie Walker | Johnnie To | Johnnie Taylor | Johnnie Ray | Johnnie Carson | Johnnie Walker (DJ) | Johnnie Johnson | Johnnie Davis | Johnnie Cochran | John Beattie | William John Beattie | Stuart Beattie | Karl Beattie | Johnnie Keyes | Johnnie Jones | Johnnie Hamp | Johnnie Casson | Beattie | Robert Beattie | No Love for Johnnie (book) | Joseph Hamilton Beattie | Johnnie O. Jackson | Johnnie Mortimer | Johnnie LeMaster | Johnnie Lee Wills | Johnnie Johnson (musician) | Johnnie Johnson (American football) | Johnnie Dodge | Johnnie Carson (diplomat) | Johnnie Beattie |
He then joined Scotland's under-21 World Championship squad after the pool stage as a replacement for injured player Johnnie Beattie, playing as a substitute in the 46–14 win against Georgia in Issoire.