Byrne is a client of self-styled "agent to the stars"
Noel Kelly of NK Management. Byrne began her broadcasting career with
East Coast Radio and worked with
BBC Radio in the
Channel Islands, before becoming news editor with
Channel 103 in
Jersey. She returned to Ireland shortly afterwards to take up her first television job as a reporter on the fledgling
TV3. Byrne left after just one year to work as London news anchor with
Channel 5 and later with
ITV News, but was lured back to TV3 to present the station's breakfast show
Ireland AM. In 2004, she replaced
Gráinne Seoige as the main female presenter of the
TV3 News at 5.30. Byrne joined the independent Irish radio station
Newstalk in 2006, amid a high-profile legal case with her former employer TV3, which went to court to stop the news anchor broadcasting on Newstalk's breakfast slot. She presented the show with Ger Gilroy, with
Ivan Yates taking over as co-presenter in 2009. In 2010, Byrne presented her last breakfast show with Newstalk before moving to
RTÉ where she co-presented, until March 2012,
The Daily Show with
Daithí Ó Sé. In a major shake up of news broadcasts on RTÉ in early 2013, Byrne joined the current affairs programme
Prime Time as an anchor alongside
Miriam O'Callaghan and
Pat Kenny. In November 2014, it was announced that she would have her own current affairs show,
Claire Byrne Live, which would be broadcast on
RTÉ One from January 2015. In August 2020 Byrne took over as presenter of the re-titled
Today with Claire Byrne, which had been known as
Today with Sarah McInerney for the summer, after the retirement of
Sean O'Rourke. In May 2022, it was announced that
Claire Byrne Live would end, and its final episode would air on 30 May 2022. In April 2023, Byrne began hosting ''Ireland's Smartest'', a quiz show developed by RTÉ. Byrne was tipped to become host of
The Late Late Show when fellow NK Management client
Ryan Tubridy announced his departure; Byrne, however, ruled herself out in May 2023. As of late 2025, Byrne was scheduled to leave RTÉ to rejoin
Newstalk, starting from early 2026.
David McCullagh was named as the new host of the
Today with ... programme, scheduled to take over the show from November 2025. Byrne's show started on Newstalk in February 2026, with
The Claire Byrne Show replacing Pat Kenny's slot on weekdays from 9:00AM-12:00PM. ==Personal life==