*Club domestic league appearances and goals, correct as of 01:35, 21 December 2024 (UTC) ‡ National team caps and goals, correct as of 17:55, 15 October 2024 (UTC)
Miller began his career in the youth system at Motherwell from the age of seven.[2] He made his senior debut as a second-half substitute in a 4–0 home victory over Inverness CT in the Scottish League Cup six days after his 16th birthday on 31 August 2022, becoming the youngest player in a major competition across the club's 136-year history.[3][4] He was an unused substitute for the first team for several fixtures during the 2022–23 season, with his first appearance in the Scottish Premiership coming in a 3–0 loss to Rangers on 28 December 2022.[2]
Miller made his debut for the Scotland under-16s aged 14 in August 2021 against England, in which he scored directly from the kick-off as play resumed at the start of the second half[13] – the strike was recorded on video, and was later awarded as the Goal of the Year in Scottish international football across all levels.[14] Miller played for Scotland under-17s in the 2022 UEFA European Under-17 Championship tournament held in Israel,[15] and was still young enough to take part again when the Scots also qualified for the 2023 tournament in Hungary.[16][2]
Personal life
Lennon is the son of former Scotland international footballer Lee Miller; his mother Donna died when he was five years old.[2][17] He has one older brother and two younger brothers. He attended Coltness High School in Wishaw, where his PE teacher rated Miller more highly than other future elite players he had seen as adolescents, including David Turnbull[13] who also emerged as a midfielder with Motherwell.[2]