When asked at the Golden Globes by UsMagazine.com if he had well wishes for the couple, Crawford, 24, said, "Absolutely! I wish her the best."
Underwood, 26, was dumped by the Gossip Girl star via text message in March 2008.
"It was completely mutual," she told Extra the following month. "We’re both fine…We broke up over text so… It’s like 'peace out.’"
The American Idol winner got engaged to Fisher, 29, the Ottawa Senators center, last December. So far, they have "no date" set, Underwood said in a radio interview earlier this month.
"Our schedules don't provide us too much time to get married and have time to really enjoy being married," she said. "We're trying to really work it out and move some stuff around."
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