Taylor Swift and Calvin Harris went out on a hot date Tuesday night in Santa Monica, California, Entertainment Tonight.

The couple had dinner at the Giorgi Baldi restaurant dressed in black. "They seem very happy and very much in love," an eyewitness said.

The 25-year-old singer and 31-year-old producer left the restaurant hand in hand as Swift showed off her long legs in a black miniskirt while wearing open-toed shoes. Reports say they ended their date at the Scottish musician's house.

Last month, the couple was spotted holding hands at a Haim performance at Troubadour Club in West Hollywood, ET reports. They have been caught in public several times.

Meanwhile, Swift is set to sit two seats away from Harris at the Billboard Music Awards, TMZ reports.

Apparently Taylor asked a few of her friends to sit between her and the DJ to make it appear that she is single because it's better for business.

Yet, Hollywood Life reports that the couple is planning to officially debut their relationship at the BBMA.

"Calvin and Taylor are looking forward to attending the Billboard Music Awards as a couple," a source tells the publication. "It's an exciting night for them because they're both nominated for awards and can expect to win at least one between them.

"However, despite going public, it's unlikely they'll pose on the red carpet for photos together," our source continues.

"Taylor doesn't mind, and has said it makes no difference now because they've taken their relationship public already, but Calvin likes to keep his personal life away from his professional life and isn't sure."

Sources say that Harris is a very attentive boyfriend and supports Taylor Swift and her career. "Taylor is so happy with Calvin, things with them just keep getting better," a source says.

Will the couple make an official announcement of their relationship soon?