Chloe Grace Moretz celebrated her birthday at a Britney Spears-themed SoulCycle class.

Chloe Grace Moretz

Chloe Grace Moretz

The 'If I Stay' actress, who is set to turn 18 next Tuesday (10.02.15), dressed up as the 'Perfume' hitmaker, 33, for a special spinning class in honour of the milestone on Wednesday (04.02.15).

The blonde beauty shared a photograph after the event on Instagram, with the caption: "Had by far my most Amazing fun wild ride at soul cycle ever for my #BirthdayRide and #BritneyRide !!!! 18 here we come!! #feb10 (sic)"

Chloe, who previously admitted she is a huge Britney fan, wore $40 lyric tabloid leggings from her idol's 'Piece of Me' concert collection for the 7am class at SoulCycle in West Hollywood with her brother, Trevor Moretz, and friends Alexa Michelle and Kylie Sparks, according to E! News.

The exercise studio was also decorated in pictures of the pop star and it played some of her biggest hits during the class.

Chloe is a regular at SoulCycle and met her rumoured boyfriend Brooklyn Beckham, 15, there last summer.

The 'Carrie' star previously admitted: "We SoulCycle at the same place, so met a while ago and then just kinda started hanging out."

The starlet has jetted off on a "secret sweet18 birthday trip" with her family and friends this weekend and told her Twitter followers she was having a great time, writing: "Life could not be better right now wow"