Services at the station, which is based in Belfast city centre, commenced on Sunday, 13 October, with Department for Infrastructure Minister John O'Dowd welcoming the facilities.
"This is another significant step in the development of our public transport offer," he said.
"I am delighted that rail services have started from Grand Central Station. The reopening of the rail line between Lisburn and Belfast is good news for the thousands of commuters and cross border passengers who use this route.
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"Belfast Grand Central Station is the largest transport facility on the island of Ireland with the capacity to cater for 20 million passenger journeys a year," he continued.
"With eight rail platforms and 26 bus stands this new facility demonstrates how infrastructure can transform and make a difference.
"Many people have been working tirelessly to get us to this point today and I thank them all."
He added: "Most of all I would like to thank the public for their patience while we carried out the important rail safety authorisation process which was vital in making today a reality."
Meanwhile, Chris Conway, Translink Group Chief Executive said: "The commencement of rail services at Belfast Grand Central is a significant milestone in the transformation of public transport in Northern Ireland, providing integrated services which connect people and place.
"The first Enterprise departure at 8.05am was a truly historic moment, marking the start of rail services at this iconic new facility and the return of cross border rail services to the heart of the city."
