Postpublished at 20:52 British Summer Time 9 August 2017
That's all from day one at the Women's Rugby World Cup.
We'll be back for game day two on Sunday, where England face Italy, Wales play Canada and Ireland meet Japan.
Summary
Final score: Ireland 19-17 Australia
Muldoon, Griffin & Spence scores tries as hosts edge win
Murphy, Parry, Samoa tries, Hewson con for Aus
Final score: Wales 12-44 New Zealand
Harries and Clay both cross for Wales but NZ run in eight tries
Final score: England 56-5 Spain
Wing Wilson leads the way with four tries as champions score 10 in all
Postpublished at 20:52 British Summer Time 9 August 2017
'We had to grind it out'published at 20:50 British Summer Time 9 August 2017
Ireland 19-17 Australia
Ireland captain Claire Molloy speaking on ITV: "That was a tough match. We knew they were going to be physical so I'm really proud. We won the collisions and got the tries at the end.
"The resilience and resolve was there and we knew if we held in there we'd create the opportunities
"We had to grind it out and the crowd were behind us. It was was massive when we scored."
Elsewhere on day onepublished at 20:46 British Summer Time 9 August 2017
Holders England beat Spain 56-5 in the first match of the day, while four-time winners New Zealand came out on top against Wales, winning 44-12.
The USA - who are three-time finalists - got past Italy 24-12.
Canada's score might be the stand out, though. The world number three side won 98-0 against tournament newcomers Hong Kong.
Ireland fans jubilantpublished at 20:43 British Summer Time 9 August 2017
Ireland 19-17 Australia
Orla Bannon
BBC Sport Northern Ireland in DublinThe fans rise as one to salute the Irish team.
It was tense all the way but they deserved to get their World Cup off to a winning start.
Sophie Spence's impact in the second half was huge.
Both packs really fronted up in the second period but Ireland won most of the crunching hits, each one cheered by the crowd who loved every minute of that.
Full-timepublished at 20:41 British Summer Time 9 August 2017
Ireland 19-17 Australia
Ireland are barely making any metres but they are keeping the ball...
And it's all over. The hosts start with a memorable victory!
Image source, PAPostpublished at 78 mins
Ireland 19-17 Australia
Ireland need to stand their ground here - Australia are coming for them.
After a quick drinks break and injury check-up, Ireland have a line-out on the halfway mark.
The Irish pack drive and drive. Possession is everything in these last few minutes.
Postpublished at 76 mins
Ireland 19-17 Australia
This is breathless drama.
Australia aren't giving up without a fight. They try and gain some territory with a touch-finder but it's charged down by Ireland and they steal the ball.
And then the Aussies steal it back! It's all too much.
Converted try - Ireland 19-17 Australiapublished at 74 mins
Hilisha Samoa (con Hewson)
It's over!
Front-rower Hilisha Samoa twists and turns and taps down around the Irish defence.
Ashleigh Hewson slices over the conversion. Two points in it!
Postpublished at 72 mins
Ireland 19-10 Australia
This is such an open game now. Australia pile forward and they're inches from the line.
Ireland getting into their stridepublished at 20:32 British Summer Time 9 August 2017
Ireland 19-10 Australia
Orla Bannon
BBC Sport Northern Ireland in DublinIt's lift off for Ireland's World Cup campaign!
Australia's second try has brought the hosts to life.
Now they're playing with the urgency and sense of purpose we expected to see from the start.
They're looking comfortable in their own skins.
Try - Ireland 19-10 Australiapublished at 70 mins
Sophie Spence
The referee thinks he can give it.
He checks.
Is it down? It's down! Ireland have a third try from another replacement.
Image source, InphoTry reviewpublished at 20:28 British Summer Time 9 August 2017
Ireland 14-10 Australia
Ireland are 11 phases in and heading for the left-hand corner.
Another drive from the hosts. Ciara Griffin wriggles even closer to the line.
Is Sophie Spence down in the corner? To the TMO we go!
Postpublished at 67 mins
Ireland 14-10 Australia
Here come Ireland again, they're getting closer and closer to the try line.
But Australia snatch possession and clear out... it falls as far as Nora Stapleton.
They start again...
Postpublished at 65 mins
Ireland 14-10 Australia
The atmosphere is electric in Dublin now.
Ireland have a line-out on Australia's 22 mark and once again the hosts get down low and attempt to drive forward.
This time, the ball rolls out and Australia have the line-out.
Ireland 14-10 Australiapublished at 61 mins
Ciara Griffin (con Stapleton)
They're over! The power and drive pays off and Ciara Griffin pounces.
Nora Stapleton lands the conversion with ease. Ireland are back in front.
Image source, InphoPostpublished at 61 mins
Ireland 7-10 Australia
Ireland pump their legs and drive forward, inch by inch.
Are they over? There are bodies everywhere!
Postpublished at 60 mins
Ireland 7-10 Australia
Ireland finally make their way back into the Australia 22 and earn a scrum about five metres out.
They need to do something with this...
Try - Ireland 7-10 Australiapublished at 56 mins
Shannon Parry
Grace Hamilton drives hard and Australia are inches from the line.
Wait for it... captain Shannon Parry crashes over with the pick and go!
Samantha Treherne has an easy conversion... but it's dreadful. She barely gets anything on it and it dribbles wide.
That could be really costly if Ireland hit back.
Postpublished at 54 mins
Ireland 7-5 Australia
Australia earn a penalty and Samantha Treherne kicks to touch to take them towards the Irish 22 line.
What can they do here...
Rebecca Clough takes the line-out well... they're pushing hard...
Image source, InphoPostpublished at 52 mins
Ireland 7-5 Australia
It feels like we're going to be camped out in the middle of the pitch for a while.
Neither side can make the break.
Image source, Inpho