Audience members at Broadway show Come From Away were thrilled to see Canadian PM Justin Trudeau give an introductory speech - none more so, perhaps, than Ivanka Trump.

While husband Jared Kushner helped her father with his speech in Nashville, Ivanka hopped on a plane from DC to New York to take in the Wednesday-night show as Trudeau's special guest.

Even dressed-down, she looked radiant with glee as the heart-throb liberal took to the stage to introduce the critically acclaimed musical about a Canadian town's response to 9/11.

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The room where it happened: Justin Trudeau and Ivanka Trump gave a standing ovation after attending opening night of the new play 'Come From Away' (above)

Family night: Ivanka sat with US Ambassador to the United Nations Niki Haley, who brought along her husband Michael and son Nalin (above)

On Broadway: Ivanka (above with Nikki Haley) flew from DC to watch the spectacle, as Canadian Prime Minister Justin Trudeau's special guest

Big talker: Canadian PM Justin Trudeau introduced the play Come From Away in New York on Wednesday night. The musical is about a Canadian town that helped stranded 9/11 travelers

Joining Ivanka was UN Ambassador Nikki Haley, pictured in the grey jacket left; Ivanka looked radiant with glee as the heart-throb liberal took to the stage to introduce the critically acclaimed musical about a Canadian town's response to 9/11

There's no doubt that Ivanka was excited to see the play, which has only just reached Broadway, of course.

She was then seen leaving their Washington residence at 9.30 on Thursday morning.

But as she was sitting next to Trudeau in the politicians' section will have added a special frisson.

Also there were Nikki R Haley, the American ambassador to the United Nations; ex-PM Jean Chrétien; and, of course, Trudeau's wife, Sophie Gregoire.

Ivanka and Trudeau appeared to get along famously during his visit to the White House last month.

So much so, in fact, that pictures of her apparently shooting the PM dreamy looks led to jokes online that she was harboring a secret crush.

What she made of the show remains to be seen - but its message seems somewhat at odds with her father's border policies.

In conversation: Prime Minister Trudeau was interviewed by Tom Brokaw at the event on Wednesday (above)

What Ivanka made of the show remains to be seen - but its message seems somewhat at odds with her father's border policies

Tennessee bound: While Ivanka enjoyed a night of fun at the theater, husband Jared Kushner (right, with Steve Bannon Wednesday) accompanied her dad in Nashville and Detroit

Gazing: Ivanka was spotted apparently gazing at Justin Trudeau during the PM's visit to the White House in February

Delighted: She seemed genuinely delighted to greet Trudeau to February's round-table discussion on the advancement of women entrepreneurs and business leaders

Jokes: The photographs of her response to the heart-throb politician leg to a series of memes and gags by social media users who joked that she had a crush on him

Come From Away is about a Canadian town welcoming in 38 stranded US plane passengers whose have been diverted in the wake of the 9/11 attacks.

Based on true events that occurred in Gander, Newfoundland, on and after 9/11, it shows the town's civilians housing, feeding and caring for the stranded foreigners.

At one point, as the passengers board their planes to return to the US, a Muslim character is subjected the a humiliating strip-search.

Speaking before the event, Trudeau - on yet another of his increasingly frequent trips to the US - commended the partnership between America and its northern neighbor.

'There is no relationship quite like the friendship between Canada and the United States,' the prime minister said, sparking off a round of applause.

He also spoke of the importance of true friendship, saying it means not just companionship but also a willingness to help and care for one another.

Before Trudeau's speech, ex-PM Chrétien, who was in office during 9/11, remarked on his memories of the shocking day.

Greet expectations: Ivanka is seen here before the show, saying hello to patrons, with US Ambassador to the UN Nikki Haley in the background

Take a Gander: Trudeau and wife Sophie Gregoire (right) meet some of the citizens of Gander, Newfoundland, on whose real experiences of 9/11 the play is based

Look of love: Trudeau and wife Sophie Gregoire discuss Come From Away after the musical wrapped up on Wednesday night