Alexander Marshall Waller (born 14 February 1990) is a rugby union player for Premiership side Northampton Saints.

[3] Born in Kettering, Waller is a product of the Northampton Saints Academy and made his debut in November 2009 against the Ospreys.

[8] In January 2014 he was named as an injury replacement in the England Saxons squad for the game against the Ireland Wolfhounds.

[10] He made his debut in the match as the Saxons slipped to a 14–8 defeat,[11] and earned a second cap the following week against Scotland A.

[12] In May that year, Waller was among a group of 16 players called up after the Premiership Final to join up with the senior England squad for the three Test summer tour of New Zealand.