Heaslip has been appointed skipper for the tournament even though Brian O'Driscoll, who has filled the post on a permanent basis since 2004, is fit after recovering from an ankle injury.
"I'm still wet behind the ears so it's great, I'm buzzing. It's really exciting to come here," the Leinster number eight said.
"I've been feeling really giddy and haven't stopped smiling since I got here....maybe it's the double espresso from the early start.
"I found out about the captaincy last Wednesday evening. Declan gave me a call to go and see him.
"In I went and after a bit of chit chat he asked me to do the job and I nearly had to stop myself jumping across the table to kiss him, which would have made it really awkward in a room with just two guys!
"I was really proud and humbled by it all. There were all sorts of emotions flying around.
"I made the obligatory call to the parents. My dad straight away said 'fair play, you've been promoted, but I'm still colonel while you're major, so I'm pulling rank on you'. I said 'thanks dad, back to reality as usual'."
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The Barbarians are one of the top invitational rugby sides with a long history and classic rugby jersey.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Lions get ready for their matches with this green training jersey. It's what the players wear. Get in the Gear!
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
$29.99
The Lions are ready to get their Australia tour underway. They arrive in Perth on Monday.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.