The Gabon forward was excited to play under former manager Thomas Tuchel at Chelsea as the pair have previously worked at Borussia Dortmund.
Tuchel was a huge factor behind Aubameyang’s arrival at Stamford Bridge.
But the German coach was dismissed just days after the 33-year-old’s arrival.
Aubameyang said: “It will be an honour and a joy again (to play under Tuchel), we had some good times in Dortmund together so I am really happy to play for him again.
“We will achieve some big things, I am sure of this and I will try to help the team.
“Come on you blues!”
Chelsea’s new manager Graham Potter was looking forward to coaching the former Arsenal captain.
He said: “It was an important goal.
“He has been working hard to get himself up to Premier League fitness and I have been really impressed with him.
“But any forward will tell you it is important for them to score and it was an important goal for us.”
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