Daryl Murphy says he is realising a "boyhood dream" after joining from Celtic from Sunderland.The 27-year-old Republic of Ireland forward, has signed a three-year deal with the Glasgow club, with the transfer fee believed to be £1.5m. [LNB]"A lot of my family support Celtic and they are die-hard fans," he said. [LNB]"I supported them as a boy and grew up knowing about the club. As soon as I heard it was concrete that they wanted me, it was an automatic choice." [LNB]Murphy, a left-footed player, has played in central and wide areas in his career and is eager to establish himself in Neil Lennon's side as striker. [LNB]"We want to win, that's the main objective here," he said. "I also want to stake a claim to be first choice striker, that's my first aim. [LNB]"It's going to be hard because there are some good strikers here but that's the first thing I need to do, make sure the manager wants me to be his number one. "That's what I've come here to hopefully achieve.[LNB] The Champions League draw is a tricky game. I hope I can be involved Daryl Murphy "It's going to be hard work but I think if I put in the work and the effort - which I will do - hopefully I can start every game and play a big part in winning the title. [LNB]"I've been used as a left-midfielder quite a lot in my career, which is not my position, it's a centre-forward. [LNB]"I know, if given the chance to play as a striker and a run of games, I can score goals, especially in a team like Celtic who will be attacking a lot." [LNB]After beginning his career with League of Ireland side Waterford United, Murphy moved to Sunderland at the beginning of the 2005/06 season. [LNB]During his spell with the Black Cats, he had loan spells at Sheffield Wednesday in 2005 and last season with Ipswich Town, where he scored six times in 18 appearances. [LNB]"Because of the fact that I wasn't playing and featuring in the manager's plans, it was an easy decision to leave," said Murphy. [LNB]"But I had some great times there and I'd like to say thanks to everyone involved there and the fans. [LNB]Murphy's competitive debut for his new side could come in the Champions League third qualifying tie, with Celtic draw with Sporting Braga hours before his transfer was completed.[LNB] MY SPORT: DEBATE Give your reaction to this story "I hope I can be involved," he added. [LNB]"The Champions League draw is a tricky game and I don't know much about them. But I think they came second in the Portuguese league this year so it will be a tough game." [LNB]Murphy is Lennon's fifth signing of the summer, with five players also leaving the club. [LNB]Speaking before the transfer had gone through, Lennon told philly.com: "He's quick, he's six foot two and I've watched him a lot for a few years now. [LNB]"He was playing for Ireland in an end of season tour in America, he caught my eye and I've kept an eye on him ever since. [LNB]"I think he'd do all right, he could take the hits for us up here."