Palace bagged Celtic's Ledley shortly before Friday's deadline, with the midfielder signing a three-and-half-year deal for an undisclosed fee.
"It has been a long day," Ledley told Palace Player. "I have just been sitting at home, waiting to get some news.
"I managed to get a flight down and get everything sorted in time, so I am very pleased to have joined a fantastic club.
"I am just glad to get the opportunity to come here and play in the Premier League.
"I am over the moon as it's every boy's dream to play in the Premier League. I have played in the Champions League and I look forward to the challenge forward ahead.
"It is going to be difficult, but we have brought in some fantastic players and I am looking forward to it."
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