The phrase "acted for the first time" is correct and usable in written English.
It can be used to describe someone performing an action or role that they have not done before.
Example: "In the school play, she acted for the first time and received a standing ovation."
Alternatives: "performed for the first time" or "debuted in a role".
Nicholas Stern, chair of the Grantham Research Institute on Climate Change and the Environment, has been equally confident: "The summit has generated, for the first time, commitments on emissions reductions from the world's two largest emitters, China and the US, and they have acted for the first time to produce proposals for action.
"The Commission has acted for the first time to curb the effect that European fish imports have on the long term viability of global fish stocks and the fight against illegal fishing," said Saskia Richartz from environmental campaign group Greenpeace.
WASHINGTON — The Environmental Protection Agency is expected to act for the first time to regulate carbon dioxide and other greenhouse gases that scientists blame for the warming of the planet, according to top Obama administration officials.
When she did, she had written the basic script for "The Ghosts," which follows three characters — a young woman, a record-store clerk and a money manager (played by Jon Spencer, singer and guitarist for the Jon Spencer Blues Explosion, whom Ms. de Beer persuaded to act for the first time) — as they seek the help of the hypnotist to deal with loss and longing.
When crying is prompted by this idea, the child sees it as a means to a further end, and acts for the first time on a desire (that is, with an end in view) (TV 197 8).
Changing behavior requires not only an understanding of how to persuade users to act — for example, the first time they land on a webpage — but also necessitates getting them to behave differently for long periods of time, ideally for the rest of their lives.
But when they acted together for the first time, she says she was bowled over: 'I was thinking, "Whatever you're doing is extraordinary," she remembers.
Congress as a body has begun to act properly for the first time in five years.
Stephen Fry and Hugh Laurie are to act together for the first time in 13 years, in an animation of the Oscar Wilde story The Canterville Ghost.
The agreement, between Clear Channel and Big Machine, the record label behind Taylor Swift and other country acts, will for the first time allow a label to collect a royalty when its songs are played on the radio.
