on second thought

Idioms  

1. Resulting from a revised opinion or change of mind, as in I thought I'd go to the movies, but on second thought I'd rather stay home. Similarly, have second thoughts means “change one's mind,” as in I've had second thoughts about moving to Florida. This idiom alludes to ideas that come later. [Mid-1600s]

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Example Sentences

He was like, ‘Nah, I don’t think acting is my passion, but I’ll never forget those moments … You know what? On second thought, it depends on the script.’

From Los Angeles Times

But on second thought, no one is better at playing The Entitled Mean Girl than Bondi herself.

From Los Angeles Times

“Actually, on second thought, I shouldn’t leave you alone.”

From Literature

Then: "On second thought, I changed my mind."

From BBC

“On second thought, an embrace would be unseemly,” she concluded, “but perhaps I could invite him to tea, as a way of saying thank you.”

From Literature