sql to add additional rows

Here is some sample data from the order and customer tables (SQL Server 2014)

Order Table
OrderID  OrderAmount    
1              300    
2              400          


Customer Table
CustomerID  CustomerFirstName CustomerLastName
500                Fred                          Smith

Need to write a query that will return all rows from customer table with a row for each order that exists

Given sample data would like query to return the following

CustomerID  CustomerFirstName CustomerLastName OrderID  OrderAmount
500                Fred                          Smith                        1             300
500                Fred                          Smith                        2             400

Not sure of best way to do this