Young wishes ex Aston Villa star well upon his retirement.
Sky Sports relayed Agbonlahor's decision to call time on his playing career at the age of 32.
Agbonlahor's contract at Aston Villa ran out last summer, and he was unable to find an agreement with a new side.
Manchester United star Ashley Young played alongside Agbonlahor at Villa.
It was while Young was at Villa Park that Agbonlahor played the best football of his career and earned a place in the England squad.
Young sent Agbonlahor a message congratulating him on a fine career.
While Agbonlahor has finished his career, Young is still going.
Next month he will be taking on Barcelona in the Champions League quarter finals with Manchester United.
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