On the week-ending September 27, "Love Story" debuted at number sixteen on the Billboard Hot , selling over 97, digital downloads.
The song jumped at the top ten on its fourth week at number nine and on its ninth week it reached the top spot, thus giving Swift her third number-one song on Billboard Hot Country Songs and her fastest song to reach number one on the chart. In the succeeding week, the song rose to its peak at number two,  becoming Swift's best-charting single at the time, along with later hits " I Knew You Were Trouble " and " Shake It Off " and first top ten in the United Kingdom.
In Ireland , "Love Story" peaked at number three. After two weeks of ascending on the chart, "Love Story" found a peak at number two, where it maintained for six consecutive weeks prior to reaching number one on the week ending March 29, , becoming Swift's first and only number one in the region until " Shake It Off " in In the following week, the track descended again to number two, but rose to the top for a second and last week on the top fifty on the week ending April 12, After nine weeks on the chart, the song peaked at number three on the week ending April 6, The accompanying music video for "Love Story" was directed by Trey Fanjoy , who previously directed the videos for the singles from Taylor Swift.
Swift decided to collaborate with Fanjoy once again because she had been able to balance both of their ideas for music videos, something Swift appreciated deeply. Swift had previously desired to film a period piece music video because of its distinctiveness from modern videos and videos she had filmed. When writing the song, she envisioned it in a prior time period, and encoded it with details accordingly. An acquaintance of hers, who followed the sixth season of Nashville Star , recommended contestant Justin Gaston.
Swift then looked through his pictures, and concluded he was suitable for the music video. Gaston was eventually eliminated and Swift contacted him immediately to film the video. Without even saying anything, he would just do a certain glance and it really came across well.
Personnel researched numerous castles in the United States and were unable to locate one in sufficient condition for filming. They had considered traveling to Europe to find a castle, but were then informed about a castle south of Nashville, Tennessee. Named Castle Gwynn , a castle that is part of the Tennessee Renaissance Festival, both located in Arrington, Tennessee , it was built in and chosen as the video's setting.
The dress was designed by Sandi Spika with inspiration and suggestions from Swift. The two had discussed the dress two months prior to the filming of the video. Accentuates were made on the video set. On the first day, the balcony and field scenes were shot.
On the set, someone had replaced the playback CD with a high-pitch, altered version of the song. As a result, Swift lent the crew her iPod to play the original track. For the scene, Fanjoy suggested a kiss between Swift and Gaston, but Swift refused to because she believed it would make for a sweeter moment.
On the second day, scenes at Cumberland University in Lebanon, Tennessee and at a ballroom were filmed. Approximately 20 dancers were used for the scene. As they make eye contact, the video then transitions to an earlier era, in what seems to be an 18th century castle, where Swift stands, wearing a corset and gown, and sings in a balcony. Afterwards, Gaston enters a party and sees Swift, wearing an elaborate gown, conversing with other young women. The two, along with others, engage in ballroom dancing.
After dancing, Gaston whispers into Swift's ear and Swift is then seen pondering at night with a lantern. She meets with Gaston and the two walk, hold hands, and feed a horse by a well. The two then go their separate paths. Later on, Swift stands in the balcony again, looking out from the window.
She sees Gaston running towards her and she immediately runs down the castle's staircase to meet him. Swift and Gaston meet in the field right in front of the castle and hold each other. The video then transitions back into the modern-day college campus as Gaston walks toward Swift and they gaze into each other's eyes, where the video concludes. Cut-scenes feature ballroom dancing and Swift performing in the balcony setting.
To date, the video has over million views on YouTube.