MGM Resorts International and Boyd Gaming announced what they are calling an ‘unprecedented partnership’ on Monday morning focused on the future of both online gambling and sports betting around the US.

The news came at the same time as MGM officially announced a deal with GVC Holdings to provide its online gambling and sports betting platform.

MGM + Boyd

The two huge gaming companies, which have casinos in a combined 15 states, said they will work together on online casino, sports betting and poker as opportunities crop up in new states. The deal’s goal, a press release from MGM, is “to significantly increase each company’s market access and customer base throughout the United States.”

Currently, some form of online gambling is legal in four states, while sports wagering is coming to at least six states by the end of 2018 or early 2019.

How will the partnership work? More from MGM:

Under this partnership, MGM Resorts and Boyd Gaming will both have the opportunity to offer online and mobile gaming platforms – including sports betting, casino gaming and poker – in jurisdictions where either Boyd Gaming or MGM Resorts operate physical casino resorts and online licenses are available.

Boyd, MGM: Together again

The two companies once held an equal stake in the Borgata in New Jersey before MGM bought out Boyd in 2016. The two companies together saw firsthand the additive opportunity online gambling revenue could provide to the bottom line when done well. Borgata’s online casino held an early lead in the NJ online casino industry before being overtaken by Golden Nugget.