Eager visitors were trying to get into Shake Shack's first Detroit location all day Wednesday, peering in the windows and through the doors of the new restaurant at 660 Woodward Ave. to see what was happening inside.

They'll be rewarded at 11 a.m. Thursday morning, when the New York-based shake and burger chain opens its first spot in Michigan.

The arrival of the restaurant, inside the Dan Gilbert-owned First National Building, has generated excitement since it was first announced in May.

The restaurant is known for its burgers, chicken, griddled flat-top dogs and frozen custard. Its menu offers Detroit-inspired desserts with locally made chocolate, nuts and pies.

Inside the store, the back wall displays a mural of downtown Detroit by native artist Jesse Kassel.

The chain's 122nd location, which faces Campus Martius Park, will open following a ribbon cutting at 10:45 a.m. Shake Shack COO Zach Koff, Bedrock LLC Executive Vice President Dan Mullen and others will attend.

The 3,300-square-foot location employs 50-60 and seats 94. Its tables of reclaimed wood from bowling alleys sit under a big Detroit Tigers "D" and framed photos of local celebrities.

On Wednesday afternoon, Stella Shi, Shake Shack's PR and marketing manager, said she had seen about 20 people try to enter the store over the course of the day. She hopes they'll be back in line in the morning, full of the same positive energy.

When asked if Shake Shack plans additional locations in Michigan, Shi said "never say never."