Billie Eilish's brother Finneas O'Connell and his girlfriend Claudia Sulewski looked very much in love at the premiere for her film I Love My Dad in Los Angeles. 
The 25-year-old producer extraordinaire wore a black sweater over a matching t-shirt, while the YouTube star, 26, stunned in a black blazer and a pair of matching skinny slacks.
Sulewski left the blazer wide open revealing her black wire strap underneath it.

Her dark hair was parted in the middle and tied back into a tight ponytail. 




Billie Eilish looks refreshed after a workout at a gym in... Billie Eilish strikes a pose in an oversized blazer and slip...
Dazzling: The YouTube star, 26, stunned in a black blazer and a pair of matching skinny slacks






Unruly: His feathery brown hair stuck out at a number of odd angles and adding an extra inch to his height

After Sulewski posed for a bit alongside her beau, she took a few photos with her co-star Amy Landecker. 
The 52-year-old Transparent actress wore a hot pink blazer and a pair of matching shorts underneath it. 
A small black top peeked out from underneath the blazer in the center of her chest. 
Her chestnut brown hair fell in waves down the sides of her face, and her eyes took on a smoky look with her eyeshadow. 











Snazzy: The film's star Patton Oswalt attended the event in a stylish gray suit and a pristine white t-shirt






Leggy: Kelsi Rhineheart wore an elegant black cocktail dress that ended near the middle of her thighs.

She stood on patterned high heels

James Morosini wore a cream-colored blazer over a button-down white shirt and matching slacks. 
Kelsi Rhineheart wore an elegant black cocktail dress that ended near the middle of her thighs.
She stood on patterned high heels. 
I Love My Dad made its premiere at South by Southwest back in March though it is finally being released in theaters on Friday. 
The movie follows Chuck (Oswalt), a father who catfishes his son (Morosini) after he blocks him on social media.   




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Wild plot: The movie follows Chuck (Oswalt), a father who catfishes his son (Morosini) after he blocks him on social media