Billie Eilish and brother Finneas spend some quality time together as they go out for a bike ride

Billie Eilish and brother Finneas spend some quality time together as they go out for a bike ride in Los Angeles

Billie Eilish and Finneas are evidently enjoying each other’s company this holiday season.

The siblings were spotted riding their bikes together through the streets of Los Angeles on Monday evening.

The Bad Guy songwriters, 19 and 23, kept their eyes fixed on the road as they make their way through the suburban LA streets.

Hitting the pavement: Billie Eilish and her brother and producer Finneas were spotted riding their bikes through the streets of Los Angeles on Monday

The No Time To Die singer was seen wearing a black graphic printed hoodie with a set of matching joggers and a pair of Nike Air Force Ones; she also wore a white beanie underneath her hood.

Her brother wore a black v-neck t-shirt and a matching pair of skinny jeans with ripped knees, white sneakers, and a pair of brown sunglasses.

The producer made sure to protect himself with a ashy grey helmet.

Both of the musicians wore face masks as a precaution against the recent rise of COVID-19 cases in Los Angeles; Finneas opted for a camouflage covering, while his sister kept hers in line with the mostly-black wardrobe she had picked out. 

Keeping it consistent: The Ocean Eyes singer opted for an entirely black-and-white wardrobe for her outing

Keeping it consistent: The Ocean Eyes singer opted for an entirely black-and-white wardrobe for her outing

The siblings have been working together from an early age and released their first song together, entitled She’s Broken, on SoundCloud in 2015.

The following year, the two again collaborated on the track Ocean Eyes, which went on to become Eilish’s breakout single.

In 2017, the duo released the EP Don’t Smile At Me, with Finneas handling all of the production on the record; it eventually reached the number 14 spot on the Billboard 200 chart.

After two years of production work, Eilish released her debut album When We All Fall Asleep, Where Do We Go? in 2019; her brother again assumed the producer’s position for the project.

Starting early: The siblings have collaborated on musical projects from early on in their careers, beginning with the 2015 track She's Broken; they are seen in November

Starting early: The siblings have collaborated on musical projects from early on in their careers, beginning with the 2015 track She’s Broken; they are seen in November

Honest opinion: In an interview with Vogue, Finneas stated that 'There’s no other person I like working with as much as my sister'; the brother and sister are seen in 2019

Honest opinion: In an interview with Vogue, Finneas stated that ‘There’s no other person I like working with as much as my sister’; the brother and sister are seen in 2019

The album went on to receive high critical acclaim and multiple awards, including the 2020 Grammy Award for Album Of The Year; Finneas also won the Producer of the Year, Non-Classical award. 

In an interview with Vogue, the producer discussed collaborating with his younger sibling, and commented that they are able to easily communicate their respective musical ideas to one another.

‘We just love each other and are honest with each other, and we speak the same creative language. There’s no other person I like working with as much as my sister,’ he noted. 

The producer also noted that the recent months have allowed the duo to get some rest before they have to go out on the road again.

He stated: ‘We have a whole year of touring ahead of us, which is a lot, but we slowed down in November and December, so things have been pretty reasonable overall.’ 

Sharing the glory: The collaborators are seen at the 62nd Annual Grammy Awards in January, where Eilish's album When We All Fall Asleep, Where Do We Go? won multiple awards

Sharing the glory: The collaborators are seen at the 62nd Annual Grammy Awards in January, where Eilish’s album When We All Fall Asleep, Where Do We Go? won multiple awards