But TV viewers were far from impressed when the Oscar nominee appeared in a less-than-funny parody of Aer Lingus.
The innuendo-filled skit on the US show Saturday Night Live has met with a decidedly mixed reaction on social media.
The 23-year-old star raised eyebrows when she dressed as an air steward called Colleen, complete with a bouffant hairstyle and a bottle green uniform, in the four-minute sketch.
In a mock pre-take-off safety announcement for passengers, there were plenty of cliches about potatoes and Shillelaghs – not to mention some seriously bad Irish accents.
At one point, comedian Kate McKinnon comes on board to tell passengers that they cannot take off because there is a dog on the runway with “sad eyes and the soul of Oscar Wilde”.
Aer Lingus yesterday responded to the sketch, seen by hundreds of thousands of viewers around the globe.
In a light-hearted poll, it asked people whether they found the skit funny. Unfortunately for Saoirse, a whopping 66pc of respondents gave it the thumbs-down.
The airline then sent out a Tweet in the style of US President Donald Trump.
“Just tried watching Saturday Night Live – unwatchable! Totally biased, not funny and the Ronan impersonation just can’t get any worse. Sad.”
Ronan got a better response for a piece elsewhere in the show, where she tried to teach viewers how to pronounce her name.
In her opening monologue, she said: “Yes, I am Irish, and I have an extremely Irish name, some would say too Irish.
“It’s Saoirse, it means freedom but I’ve got a little problem – it’s spelled wrong, the full typo.
“You can see why people have a hard time. If it was a Wheel Of Fortune puzzle, you couldn’t afford it. There’s too many vowels, God bless them.
“No one has been able to pronounce my name – not even close.”
She wasn’t the only Irish celebrity to appear on the show.
She introduced chart-toppers U2, who sang American Soul and Get Out Of Your Own Way from their new album, Songs Of Experience.