That's all for tonight, we'll just leave you with 10 great Messi goals to help you get off to sleep.

Join us again tomorrow. We'll be back for the Argentina star's press conference at 10:00 BST and we'll have all the latest transfer news before that too.

PSG are yet to win the Champions League in a decade of Qatari ownership and subsequent heavy investment, with the 2020 final defeat against Bayern Munich the closest they have come.

Mauricio Pochettino's side also finished second to Lille in Ligue 1 last season.

Image source, BBC Sport

On Sunday Messi broke down in tears at a news conference in which he admitted he did not want to leave Barcelona, but had no choice.

Messi had agreed a new deal - on 50% of his old wages - to stay at Barcelona but the club could not afford to implement it because they were so far above the wage limit allowed by La Liga.

"He used to earn 140m euros gross a year at Barca, that's around £125m," BBC Sport columnist Guillem Balague told BBC Radio 5 Live. "Take off about 40-50% for tax.

"He agreed to stay at Barcelona by reducing his wages by 50%, not more than that because that's illegal [under Spanish law]. Basically the league wouldn't believe he was reducing his wages to zero, which is what Barcelona may have tried to do as they are 1bn euros in debt. Basically they cannot afford him."

Keeping Messi at the Nou Camp had been president Joan Laporta's top priority this summer, but attempts to agree a new contract were severely complicated by the club's financial problems.

He officially became a free agent when his previous deal expired on 1 July, but it was still widely anticipated he would stay.

However, Barcelona confirmed last week that Messi would be leaving the club because of "financial and structural obstacles".

Image source, Reuters

While we were waiting for the big announcement tweet, here is what Messi was doing.

Before...

Image source, Getty Images

...and after.

Image source, Getty Images

Messi will be reuniting with former Barcelona team-mate Neymar, and linking up with Kylian Mbappe, widely regarded as the heir to his throne as the best player in the world.

Is it football's best front three? BBC Sport's Harry de Cosemo investigated.

Image source, Getty Images

Former Brazil, PSG and Barcelona midfielder Ronaldinho has sent some love Messi's way.

"It is a great joy to have played for these two clubs and to now see my friend wearing that shirt, I hope many happy moments are to come Leo!

"I'm also very happy with my friend Sergio Ramos on the team, it's a great line-up, I smell Champions."

Messi is PSG's fourth free-transfer signing this summer. The others are:

• Netherlands midfielder Georginio Wijnaldum
• Spain defender Sergio Ramos
• Italy goalkeeper Gianluigi Donnarumma

And highly rated Morocco right-back Achraf Hakimi has also joined from Inter Milan.

After six hours teasing on Twitter, PSG have finally announced Messi.

The day that we thought would never happen, Messi dressed in a kit that isn't Barcelona's.

Let's go from the beginning of this historical day.

Luis Suarez was spotted leaving Messi's Barcelona home this morning just before the Argentina star left for Paris to complete his medical after agreeing to a two-year deal.

Antonela Ruccozzo, Messi's wife, posted a social media post saying "with everything towards a new adventure, together the five of us" on their way to Paris looking like kids on their way to Disneyland.

Neymar showed some love on social media also, not hiding his excitement about getting "back together" with his former Barcelona partner.

The excitement and anticipation built up all over the world and after five teaser videos from PSG, Messi is officially announced.

Just like his start with Barcelona, Messi will be wearing the no.30 with PSG's no.10 comfortably on Mbappe's back.

And now we'll see Leo Messi and Sergio Ramos on the same team.

Considered one of the greatest players of all time, Messi scored a record 672 goals in 778 games for Barca, the club he joined as a 13-year-old.

The striker has won the Ballon d'Or a record six times and lifted 35 trophies with the Catalan club.

French football journalist Julien Laurens is one of many PSG fans who can't quite get his head around what is happening.

We are likely to hear much more from Messi tomorrow.

Earlier today, while they had us all hanging on wondering when the move would be confirmed, PSG announced that there would be a news conference at Parc des Princes at 10:00 BST.

There might be one or two fans there to greet him. These were the scenes earlier today.

Image source, Getty Images

It's been a bit of a whirlwind few days for Messi, but he could play for PSG as early as Saturday.

Their next Ligue 1 fixture is at home against Strasbourg.

Nasser Al-Khelaifi, Chairman and chief executive of Paris Saint-Germain said: “He has made no secret of his desire to continue competing at the very highest level and winning trophies, and naturally our ambition as a club is to do the same.

"The addition of Leo to our world class squad continues a very strategic and successful transfer window for the club.

"Led by our outstanding coach and his staff, I look forward to the team making history together for our fans all around the world.”

Lionel Messi, 34, said: “I am excited to begin a new chapter of my career at Paris St-Germain.

"Everything about the club matches my football ambitions.

"I know how talented the squad and the coaching staff are here.

"I am determined to help build something special for the club and the fans, and I am looking forward to stepping out onto the pitch at the Parc des Princes.”

The Argentina star has arrived in Paris.

PSG have confirmed it is a two-year contract, with the option of extending for an extra year.

Paris St-Germain have been teasing us all day on Twitter but the big announcement is finally here.

Lionel Messi has signed a two-year deal with the side, two days after his tearful farewell from Barcelona.