The ship was ordered on 26 October 1987 by Effoa for Silja Line traffic. The ship had a revolutionary interior layout, a promenade-street running alongside the central axis of the ship for nearly her full length. This allowed amongst other things for a larger number of cabins with windows. Before the ship was completed Silja Line's owners Effoa and Johnson Line merged to form EffJohn, and it was to EffJohn that the Silja Serenade was delivered on 15 November 1990. On November 18 she began service on the route Helsinki–Stockholm route. Her original homeport was Helsinki, but in 1992 she was reflagged to the Ålandian shipregistry, her homeport altered to Mariehamn. This allowed Silja to make more money from her onboard slot machines and casino, due to legislation differences between Åland and the Finnish mainland. When Silja Line acquired Silja Europa in 1993 the Serenade was moved to the Turku–Mariehamn–Stockholm route. The Silja Serenade was somewhat ill-suited for this route, her accommodations were not designed for daytime crossings and reportedly she steered poorly in the narrow archipelagoes of Stockholm, Åland and Turku. In 1995 it was decided that the Europa and Serenade switch routes, returning the Serenade to her original route, again sailing parallel to her sister shipSilja Symphony. In order to keep tax free sales on the Stockholm–Helsinki ships when the EU changed its tax free legislation, a stop at Mariehamn was added to the route in July 1999. In early 2006, just prior to the sale of Silja Line to Tallink, Serenade and her sister had their interiors extensively rebuilt at Turku Repair Yard, Naantali. There are some minor differences between the Serenade and her sister. The funnel of Serenade is constructed of steel whereas that of her sister ship Symphony is made of aluminium. There are also some purely cosmetic differences: the outer decks of the Serenade are painted green, the light box with the ship's name is blue and the seal's eye in the funnel is white with a blue outline. In 2014, the steel seal was replaced with a painted one. When the ship docked in October 2010, the 13th deck was rebuilt, removing Silja Dream Teather, Club Bali and Chill Lounge. Instead, there was built a New York-themed club and lounge. In January 2014, the ship was docked again at Turku Repair Yard. The Taxfree shop, Buffet Serenade, and Bistro Maxime restaurant on deck 6 were extensively rebuilt, as well as the Sunflower Oasis on deck 12 and the shops on deck 7.
