Lo and behold is an expression used to express surprise or amazement. The two crossword solutions, Voila (5 letters) and Oho (3 letters), are both exclamations of surprise. Voila is a French expression that is used to express satisfaction or surprise at the successful completion of a task. Oho is an expression of surprise or realization. Both of these expressions can be used to emphasize the phrase 'lo and behold'.