|Full name||Andrew Frank Millen|
|Date of birth||10 June 1965|
|Place of birth||Glasgow, Scotland|
|1995||→ Ipswich Town (loan)||?||(0)|
|1997||→ Ayr United (loan)||3||(2)|
|* Senior club appearances and goals counted for the domestic league only.
† Appearances (Goals).
Millen achieved a notoriety later in his career for playing on at a high level despite his age. When he played for St. Mirren against Dundee United on 5 May 2007 at Tannadice, he became the oldest player to play in the Scottish Premier League. He broke the record set by Aberdeen goalkeeper Jim Leighton, who was aged 41 years and 302 days when he last played in the SPL. Gus MacPherson argued that Millen's record is more notable because Millen played in the more physical role of an outfield player.
Millen took control of the St. Mirren team for a match against Motherwell in November 2007, after a family bereavement prevented Gus MacPherson from attending the match, which ended in a 1–1 draw.
Millen announced his intention to retire from first team football in June 2008. During his time with St. Mirren, he won the Scottish Challenge Cup and the Scottish First Division in the 2005–06 season. Millen's last league appearance was against Hearts on 15 March 2008, which meant that he set the SPL record for oldest player at 42 years and 279 days, almost a whole year more than the previous record.
Millen continued working as assistant manager to Gus MacPherson after retiring as a player. After Danny Lennon was appointed as manager, however, Millen left the club to allow Lennon to appoint his own backroom staff.
Millen was appointed assistant manager of Queen of the South on his 46th birthday on 10 June 2011. Millen parted company with Queens on 30 April 2012, alongside MacPherson, after the club was relegated to the Scottish Second Division.
- SCOTLAND B INTERNATIONALS, Scottish Football Association.
- "Millen confirmed as SPL's oldest". BBC Sport. 14 May 2007. Retrieved 9 June 2010.
- "Millen hangs up boots for Buddies". BBC Sport. 24 June 2008.
- "St Mirren and Millen part company". BBC News. 11 June 2010.
- "Andy Millen given Hamilton Accies assistant manager job". BBC Sport. 26 July 2010. Retrieved 27 July 2010.
- McDermott, Scott (12 December 2010). "Hamilton U-turn as Stuart Taylor is re-appointed first-team coach 10 days after leaving club". Sunday Mail. Retrieved 22 February 2011.
- "Gus is our new Manager" www.qosfc.com 10 Jun 2011
- Jeffrey, Jim (2005). The Men Who Made Hibernian F.C. since 1946. Tempus Publishing Ltd. ISBN 0-7524-3091-2.