Johnson returns to Crystal Palace on a free transfer[GETTY]
The 33-year-old, who scored 85 goals in 160 appearances during his first spell with the club, will take on a coaching role with the academy as well as strengthening Neil Warnock's striking options.
Johnson was available as a free agent after leaving QPR at the end of last season.
He has been included in the club's 25-man Premier League squad, and will also be coaching some of the club's academy players.
I am delighted to be coming back to a club that I love and have a real soft spot for
Andrew Johnson
The former Fulham striker said: "I am delighted to be coming back to a club that I love and have a real soft spot for.
"I would like to thank the gaffer and the chairman for giving me this opportunity and I am looking forward to helping this football club have continued success in the Premier League.
“I have also been given an opportunity to help the youngsters in a coaching capacity, something I am really looking forward to getting involved in.”
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