Picture Perfect (1997)

Plot:

Kate is working on a career at Mercer Advertising, but she is passed up for promotion because she is 'not stable enough', still being single and having no ties to the company. She makes up a story about being engaged to Nick, a guy whom she just met at a friends' wedding. All seems to work out well for Kate. She even gets the attention of a colleague she had always wanted, but then events take a dramatic turn forcing her to 'present' her alleged fiancee to her boss...