The 20-year-old signed until the end of the season after training with his new team-mates today and will go into the squad for the Scottish Communities League Cup semi-final against Inverness tomorrow.
Ngoo told Hearts News: "I'm honoured to be here. I'm delighted and happy to be at such a big team and I'm ready to go." Ngoo follows Liverpool team-mate Danny Wilson in signing for Hearts after the club's transfer embargo was lifted by the Scottish Premier League earlier this month.
(re-opens) Hearts manager John McGlynn believes Ngoo could be a secret weapon against Caley Thistle. "He'll definitely be in the squad for tomorrow," McGlynn said. "He could be something that Inverness hasn't bargained for. He could be a surprise package. "He's very similar to Danny in that he's been playing regularly.
The English Under-21 teams didn't have much of a break over Christmas and new year so he's been playing and he's match-fit and raring to go. "I don't want to put too much pressure on him, it's not fair to think that he's going to batter every ball that comes into the box into the back of the net.
"However, we hope that he's going to improve our goal scoring tally." McGlynn added: "He's come from a big football club. Liverpool signed him from Southend and paid a bit of money for him so they have high hopes for him.
"It was the priority position for us. I said last week that when there's a player like Danny Wilson, you can never have enough good players about. You take good players any time.
"It probably helped that Danny is now here as he obviously knows the lad, he spoke to Michael and gave good him a good report on the football club."