The Office for National Statistics (ONS) said the economy grew by 0.4% in the quarter, compared with an earlier estimate of 0.3%.
Growth was boosted by a better performance from the construction industry than previously estimated.
On an annual basis, the economy grew by 2.9% from the first quarter of 2014, up from a previous estimate of 2.4%.
The latest revision is the third estimate for the period.
For 2014 as a whole, economic growth was revised up to 3% from 2.8%.
The ONS figures showed household disposable income grew by 4.5% year-on-year, the fastest annual pace since the second quarter of 2001.
Earlier this month, the ONS said construction output in the UK was 0.2% lower in the first quarter, rather than 1.1% lower as previously estimated.
"The slight upward revision to growth in the first quarter of 2015 is down largely to the recently announced new methods to  measure construction output," ONS chief economist Joe Grice said.
Quarterly growth in services output was left unrevised at 0.4%.
Howard Archer, chief UK and European economist at IHS Global Insight, forecast economic growth would accelerate in the three months to June as the uncertainty caused by the general election in May subsided.
He said he expected the economy to grow by 0.7% in the second quarter and by 2.5% over the course of the year.

Sunderland said they agreed a three-and-a-half-year deal with M'Vila but "decided not to enforce the contract".
M'Vila, 26, made 37 appearances for the Black Cats on a season-long loan last term before returning to Rubin Kazan.
"Any player we bring to Sunderland must be wholly committed," said chief executive Martin Bain.
M'Vila missed just one Premier League game as he helped Sam Allardyce's side avoid relegation last term, with Black Cats fans hopeful the club would sign him on a permanent deal last summer.
However, the move failed to materialise on transfer deadline day in September, leading to M'Vila posting an Instagram message - which was later deleted - saying he had tried contacting the club to push the deal through.
M'Vila returned to the Russian club when his loan deal expired, making nine appearances in the Russian Premier League this season.
Sunderland had not announced they had agreed a deal to re-sign the player until they revealed on Wednesday it had fallen through.
"I was contacted this week by Yann M'Vila's representatives, who advised that the player no longer wishes to join Sunderland," added Bain.
"There was a three-and-a-half-year agreement in place, however after discussions with the manager we have decided not to enforce the contract."
The UK economy grew faster than previously estimated in the first three months of the year, figures have shown.
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Sunderland say they will not be signing Yann M'Vila in January after being told the French midfielder no longer wants to re-join the Premier League club.