Antonio Banderas, 53, who split from wife Melanie Griffith earlier this month after 18 years of marriage, is believed to be in a relationship with Sharon Stone. A source said: ”Antonio and Sharon have been great friends for years. They have always flirted outrageously and now they’re closer than ever. It’s all very relaxed at the moment and they want to keep it quiet out of respect for Melanie, but there’s no denying the spark is there.” The Puss in Boots star and Sharon, 56, are believed to be planning a holiday next month. The source continued: ”Antonio and Sharon are making plans for a getaway together in July. They’ve both been married twice before and are just enjoying having fun.” Melanie – who has 17-year-old daughter Stella with Antonio – apparently doesn’t mind the new relationship. The source told Grazia magazine: ”Mel feels weird about Sharon and Antonio’s closeness, but knows they both needed to move on from the marriage.”