Born in Sydney, Australia, Lachlan Monaghan trained there at the the McDonald College and then at the Royal Ballet School. As a student he danced with The Royal Ballet in Romeo and Juliet, Alice's Adventures in Wonderland and The Prince of the Pogodas. At the Royal Ballet School his repertory included: Black Knight in Checkmate, Paquita pas de trois, Parrish Maynard's Fractals, Jirí Kylían's Un ballo and John Neumeier's Spring and Fall. He won the 2009 McDonald's Ballet Scholarship in Sydney and a bronze medal at the 2010 Adeline Genée Awards. He joined Birmingham Royal Ballet in 2012 and was promoted to First Artist in 2016.
Frederick Ashton: Les Rendezvous (pas de trois)
George Balanchine: Slaughter on Tenth Avenue (Hoofer)
David Bintley: The Prince of the Pagodas (King of the West), Sylvia (Magog), Take Five, The Shakespeare Suite (Hamlet, Petruchio), The King Dances (Demon)
Jessica Lang: Wink
Joe Layton: The Grand Tour (Douglas Fairbanks)
Kenneth MacMillan: Elite Syncopations ('Friday Night,' 'Hothouse Rag'), Romeo and Juliet (Mercutio)
Alexander Whitley: Kin.
Peter Wright's productions of The Sleeping Beauty (pas de quatre), Coppélia ('Call to Arms') and The Nutcracker (Clara's Dancing Partner, 'Chinese Dance', 'Russian Dance', Consorts, Jack-in-the-Box)
McDonald's Ballet Scholarship, 2009
Bronze medal, Adeline Genée Awards, 2010