نینا دوبرو (به انگلیسی: Nina Dobrev) متولد شده با نام نینا کنستانتینوا دوبروا (به انگلیسی: Nina Constantinova Dobreva) (زادهٔ ۹ ژانویه ۱۹۸۹)، هنر پیشهٔ زن کانادایی است که از جمله کارهای وی سریال خاطرات خونآشام است که هم اکنون از شبکه سیدابلیو پخش می شود. او به علت نقش کاترین پیرس و الینا گیلبرت در سریال خاطرات خونآشام مشهور شده است.
نینا Dobrev در صوفیه، جمهوری مردم بلغارستان (در حال حاضر جمهوری بلغارستان) به عنوان Николина Константинова Добрева متولد شد و در سن دو سالگی به کانادا رفت، جایی که او در تورنتو، اونتاریو مطرح شد. او به زبان فرانسوی، انگلیسی و بلغاری مسلط میباشد. او دارای یک برادر بزرگتر به نام الکساندر میباشد، پدر او یک متخصص کامپیوتر است و مادر او یک هنرمند است .
دوبرو در مدرسه دولتی jb tyrrell حضور یافت،جایی که او حضور در کلاسهای باله و موسیقی جاز و رقابت در ژیمناستیک ریتمیک را آغاز کرد. سپس او به مدرسه وکسفورد دانشگاهی هنر در اسکاربرو، انتاریو و دانشگاه رایرسون در تورنتو در رشته جامعه شناسی حضور یافت، او آنجا را در سال 2008 به دنبال حرفه بازیگری ترک کرد .
Nikolina Konstantinova Dobreva (Bulgarian: Николина Константинова Добрева; born January 9, 1989), known professionally as Nina Dobrev, is an actress and a model. She is Canadian, and was born in Bulgaria. She played the role of Mia Jones, the single teenage mother, on Degrassi: The Next Generation, from the show's sixth to ninth season. She stars as Elena Gilbert and Katherine Pierce on The CW American television teen drama, The Vampire Diaries.
Early life 
Nina Dobrev was born in Sofia, People's Republic of Bulgaria (now Republic of Bulgaria) as Николина Константинова Добрева, and moved to Canada at the age of two, where she was raised in Toronto, Ontario. She speaks fluent French, English, and Bulgarian. She has an older brother, Alexander; her father is a computer specialist and her mother is an artist.
Dobrev attended J. B. Tyrrell Sr. Public School, where she started ballet and jazz classes, and competed in rhythmic gymnastics. Then, she attended Wexford Collegiate School for the Arts in Scarborough, Ontario, and Ryerson University in Toronto, majoring in sociology. She left in 2008 to pursue her acting career.
Modeling jobs led to commercials, which then turned into film auditions. Shortly thereafter, she booked roles in feature films, including Fugitive Pieces, Away from Her, Never Cry Werewolf, and the television series Degrassi: The Next Generation. She starred in a number of Lifetime original movies. In 2007 she appeared in the music video of You Got That Light performed by Wade Allain-Marcus and David Baum. She also was in an MTV movie called The American Mall on CTV. She is currently starring in The CW's drama The Vampire Diaries, playing the dual role of Katherine Pierce, a vampire loved by two human brothers during the American Civil War, and Katherine's doppelgänger Elena Gilbert, a human who is caught between the same two brothers, now vampires, Damon and Stefan Salvatore.
She also had a minor role in the erotic thriller Chloe, theatrically released by Sony Pictures Classics on March 26, 2010. The film had enjoyed commercial success and became director Atom Egoyan's biggest moneymaker ever.
In April 2011, she was cast as Candace in the film adaptation of The Perks of Being a Wallflower, alongside Logan Lerman, Emma Watson, and Paul Rudd. Shooting began in May of that year in Pittsburgh, Pennsylvania, and she completed her scenes on June 27, 2011. The film was released in September 2012.
In 2012, she appeared in a Funny or Die music video with Nick Braun called SPF. The song, written by Dobrev, Braun, and hip-hop producer Jewels Beats, charted as high as #188 on iTunes Comedy Charts.
In September 2011, Dobrev co-hosted We Day alongside Joe Jonas. We Day is organized by Free the Children. Dobrev also designed a T-Shirt with Me to We Style, which gives 50% of its profits to Free the Children.
Personal life 
While working on the show, Dobrev began dating her Vampire Diaries co-star Ian Somerhalder. It was rumored that they had split in May 2013. Nina's best friend is Dancing With The Stars and Rock of Ages star Julianne Hough