Former Bluebirds’ defender Semi Ajayi is relishing his Championship challenge ahead.
The big centre-half played a key role for Rotherham in their 2-1 League One play-off final success against Shrewsbury Town and then revealed he has committed to the Millers for two years.
“So pleased to have joined @OfficialRUFC permanently till 2020,” he tweeted after their Wembley triumph.
“Very excited for the future ahead, hard work only continues now.”
Ajayi also tweeted his gratitude to Cardiff City FC for their part in developing his game.
“Massive thanks to all those connected with @CardiffCityFC for everything during my time there,” he said. “Wish you all the best in the future.”
Former Nigerian under-20 international Ajayi signed for Cardiff from Arsenal in 2015 and did not make a first team appearance, but was a regular under-23 player.
The Bluebirds will be in the Premier League next season, but Ajayi will be back in Wales when Rotherham take on Swansea City at the Liberty Stadium.
Rotherham will celebrate their play-off final win with thousands of their fans during an open-top bus tour of the town this evening.
Defender Richard Wood scored both Rotherham goals at Wembley against Shrewsbury and the Yorkshire club emerged winners after extra time.
David Ball missed a first half penalty, Wood headed Rotherham in front. Alex Rodman equalised before Wood steered home a 103rd-minute winner off a post.
Rotherham, relegated from the Championship last season, bounce straight back, while Shrewsbury have now been to Wembley five times and lost on each occasion.
The 26,218 crowd made it the lowest third-tier final attendance since Tranmere v Notts County in 1990 when there were 29,252 at the old national stadium.
In the 27 finals that followed, none had ever dipped below an attendance of 30,000.
“I call Richard Wood my human wrecking ball as every time he goes in the box he heads anything and can always do some damage,” said Rotherham manager Paul Warne.
“He’s my only player over 30 and I love what he does for me on and the pitch.”