The couple were wearing their 70's best as they walked the carpet for the musical's premiere at The Star.
Sarah, 34, looked glamorous in silk, turquoise gown, with her hair in the classic big curls blowout of the era.
While Sarah looked chic, her fiance James, 43, looked suave in a pale blue suit and pale yellow shirt with a few too many buttons unbuttoned.
He completed the look with 70's style aviators.
After meeting on the set of Home and Away, Sarah and James began dating in October 2017 and announced their engagement in December 2018.
Speaking to New idea in December of their upcoming nuptials, Sarah revealed they were planning a wedding for later in the year.
"Spring would be a great time to have our wedding. New beginnings, new life, new chapter."