Hollywood actress Reese Witherspoon is currently working with “Twilight” star Robert Pattinson on a new film – “Water for Elephants” – and it’s being said that the co-stars are getting awfully close. A source told Fox News last month that Rob had Reese “blushing” on set and continuously showered her with compliments during production for the movie. And now Reese has reportedly introduced her 10-year-old daughter Ava Phillippe to the English actor:

“Ava seemed especially excited to meet him,” an onlooker tells PEOPLE, who also notes that younger brother Deacon, 6, chatted with the British actor. “The filming with Rob is going really well,” adds an on-set source “and Reese was excited for the kids to meet him.”

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This comes just one month after sources spotted the actors getting very friendly with each other on the set of their new film:

“Rob worked with Reese seven years ago on Vanity Fair. He had a tiny part and he joked with Reese that, of course, she didn’t remember him from their time together then,” a source told Fox News. “They joke a lot and Rob has her blushing and laughing all the time. He’s very charming. He went on about how she is this beautiful, super-famous Academy Award winner, and Reese loved it. She was flattered and giggling while he teased. It’s cute and it makes for a great movie set. Everyone is excited because they fit so well together.”