The dollar rose to a one-week high on Friday after upbeat U.S. gross domestic product data while Britain's pound slipped after a poll showed a narrowing lead for the ruling Conservatives before elections next month.
The dollar index, which tracks the greenback against six major rivals, was up 0.19 percent to 97.43, after rising to a high of 97.512, its strongest since May 19.
The U.S. economy slowed less than initially thought in the first quarter. Gross domestic product increased at a 1.2 percent annual rate instead of the 0.7 percent pace reported last month.
"The GDP figure was a pleasant surprise. I don't think markets were looking for a revision this big," said Sireen Harajli, FX strategist at Mizuho in New York.
"It confirms or at least gives some relief to the idea that the weakness that we had seen in economic performance is likely to be transitory."