Question: Who is the older sister of the actress who co-starred with Allu Arjun in the film Gangotri?

Context paragraphs:
Desamuduru: Desamuduru (English: Smart boy) is a 2007 Telugu action film directed by Puri Jagannadh and produced by DVV Danayya under the Universal Media banner.  The film stars Allu Arjun and Hansika Motwani in the lead.  The movie was released on 12 January 2007 in 400 theatres.  This movie is one of the biggest hits in Allu Arjun's career.  Rambha acted in an item song alongside Allu Arjun.  It was dubbed into Malayalam and Tamil as "Hero: The Real Hero", and Hindi as "Ek Jwalamukhi".

Aditi Agarwal: Aaditi Agarwal (born January 27, 1987) is an Indian actress who primarily worked in Telugu cinema, also known as Tollywood.  She is the younger sister of Tollywood actress Aarthi Agarwal.

Race Gurram: Race Gurram (English: "Race Horse") is a 2014 Indian Telugu-language action comedy film directed by Surender Reddy and produced by Nallamalupu Srinivas under his banner Sri Lakshmi Narasimha Productions.  The film features an ensemble cast of Allu Arjun and Shruti Haasan in the lead roles while S. Thaman composed the music.  This marks Allu Arjun and Shruti Haasan's first collaboration.

Badrinath (film): Badrinath (బద్రీనాథ్) is a 2011 Indian Telugu-language action film directed by V. V. Vinayak and produced by Allu Aravind.  The film stars his son Allu Arjun in leading role along with Tamannaah Bhatia and Prakash Raj.  It was released on 10 June 2011 simultaneously in Telugu and Malayalam.  The movie was released in 1,400 screens worldwide and ran for 50 days in 187 theatres.  According to an article in The Times of India, "Despite mixed record tendered by critics, the acceptable storyline and script work, the thrills and stunts, the gyrations of choreography by Allu Arjun have lured the audience to the screens. "and the film proved to be a big success.

Arya 2: Arya 2 ( [] -2]; Telugu: ఆర్య-2, "Ārya-2" ) is a 2009 Telugu action comedy-romance film directed by Sukumar, and is a follow-up to the actor's and the director's previous successful film, "Arya".  Allu Arjun and Kajal Aggarwal play the lead roles while Navdeep and Shraddha Das play supporting roles.  The film's music is by Devi Sri Prasad.  Aditya Babu and Bhogavalli Prasad produced the film under the Aditya Arts banner.  The film was dubbed in Malayalam, Tamil and Oriya with the same title, and became a blockbuster in Kerala.  Some scenes were recreated with Malayali-based scenes for this.  Allu Arjun gained huge fan base in Kerala through this film.

Race Gurram (soundtrack): Race Gurram is the feature film soundtrack of the 2014 family drama film of the same name starring Allu Arjun, Shaam, Shruti Haasan and Saloni Aswani.  Directed by Surender Reddy, the film's music and background score was composed by S. Thaman marking his first collaboration with Allu Arjun and second collaboration with Surender Reddy.

Bunny (2005 film): Bunny is an Indian Telugu-language action-masala film that was released in the year 2005.  This is Allu Arjun's third movie, which proved to be his third successive box office hit after "Gangotri" and "Arya".  This film stars Allu Arjun in the lead role and Prakash Raj and Gowri Munjal in other roles.  This was dubbed into Oriya as "Dharmayuddha", into Hindi as "Bunny The Super Hero" and into Malayalam with the same title.  The film was remade in Bengali as "Challenge" by Raj Chakraborty starring Dev & Subhashree Ganguly.  Allu Arjun got his nickname "Bunny" famous after the film release.He was called as "Bunny" in home from his childhood.

Allu Arjun: Allu Arjun is an Indian film actor who primarily works in Telugu cinema.  After playing child artist in "Vijetha" and as a dancer in "Daddy", Arjun made his adult debut in "Gangotri".

Gangotri (film): Gangotri is a Telugu film which released on 28 March 2003 and was directed by K. Raghavendra Rao.  Allu Arjun and Aditi Agarwal played the lead roles.  This was Allu Arjun's first film as an actor and K. Raghavendra Rao's 100th film as director.  Allu Aravind and C. Ashwini Dutt, both who are big-time producers, produced the film.  The film was later dubbed into Malayalam and Hindi under the name 'Simhakutty' and 'Gangotri' respectively.  .

Allu Arjun, roles and awards: Allu Arjun is an Indian film actor known for his work in Telugu cinema.  In 1985, at the age of two, he made his Telugu debut in the film "Vijetha", directed by A. Kodandarami Reddy.  Sixteen years later, Arjun made a cameo appearance as Gopi, a dancer, in the 2001 film "Daddy" directed by Suresh Krissna.  He had his first leading role in the 2003 film "Gangotri", directed by K. Raghavendra Rao which was the latter's 100th film as a director.  In the film, Arjun played an adolescent named Simhadri living in Rayalaseema, who falls in love with a factionist's daughter.  He received positive reviews citing his looks and performance, with Sify adding that he had a "long, long way" to go in terms of acting.  He won Filmfare Awards South, CineMAA Awards and Nandi Awards for Best Male Debut in terms of his acting.

Supporting paragraphs: Gangotri (film) Aditi Agarwal
Answer: Aarthi Agarwal