THE Carlow native defended herself on the Friday night talk show.
The Lady Bird actress starred on The Late Late Show to promote her new film, written by Greta Gerwig.
While chatting about her professional life, she also touched on the topic of her hosting skills when presenting the latest episode of SNL.
The actress also acted in a sketch about airline Aer Lingus, which was not well received by the majority of Irish people online.
saoirse ronan's aer lingus SNL script was like an essay that you started an hour before it's due
— kelly (@earley) December 3, 2017
Sorry. I know I shouldn't, but I have to tweet this. Even by the woeful standards of #SNL, this is dreadful. No British station would get away with this depiction of the Irish as potato-scoffing eejits. The dire accents? The Arran jumpers? Unbelievable. https://t.co/wXw6ll2rM4
— ?Donald Clarke? (@DonaldClarke63) December 3, 2017
The sketch even prompted a reply from Aer Lingus themselves which poked fun at the lack of humour in the sketch.
Just tried watching Saturday Night Live - unwatchable! Totally biased, not funny and the Ronan impersonation just can't get any worse. Sad
— Aer Lingus (@AerLingus) December 3, 2017
Controversy aside, Ronan appeared on the Late Late and clarified why she agreed to the sketch and stressed she is proud of her Irish heritage.
Ronan said she was delighted when she was asked to host: "It was fun and the show is a comedy show and it was a huge thing for me to go on, I mean it's a dream come true for me to go on and do something like that and it was amazing.
"One of the things that was really important for me throughout the week, Lorne Michaels, the creator of the show, had numerous meetings, and whenever he asked me what I wanted or felt strongly about, I would say I really want to use my own accent as much as possible and I want to have at least one Irish sketch.
"I got to host the show which was a huge honour and it was great to get U2."
When asked if she was anti-Aer Lingus, she assured Tubridy she was an avid fan: "I’m not anti-Aer Lingus! Listen, I collect my points on Aer Lingus, that's how often I fly Aer Lingus. I shop local of course and eat Tayto! You know it was so much fun and to be able to represent Ireland and great to have U2 on the show with me."
— The Late Late Show (@RTELateLateShow) December 8, 2017