The 22-year-old was handed the skipper’s armband by Rafa Benitez on the eve of the Championship season.
Lascelles will lead the club out against Huddersfield Town at St James’s Park on Saturday. Newcastle, beaten 1-0 by Fulham in last week’s Championship opener at Craven Cottage, are looking to get their campaign up and running.
And Lascelles feels he has the attributes needed to lead United in what will be a challenging and demanding season.
“Age is just a number for me,” said Lascelles, signed from Nottingham Forest two years ago.
“If you’re a big enough character to deal with certain situations, you can deal with it.
“Maybe, at the start of last season, this team did lack a bit of personality, but I think it’s changed a little bit now. We’ve brought in some massive players.
“Just because I’m the captain, it doesn’t mean other players can’t lead each other on the pitch.
“We’ve got three, four or five players who could wear the armband as well.
“It’s nice to play with them and have them in the squad.
“It’s unbelievable, I can’t put into words how I feel.
“For Rafa Benitez to give me the armband, with the players he’s worked with, just shows how much trust he’s got in me.
“I makes me feel really pleased. I’m over the moon with it.
“To be fair, the boys have been really supportive. They’re behind me.
“Over the games, he’s been a bit more serious and asking me questions. Of course, I’ll grab it with two hands and take it on board.”